---
_id: '14246'
abstract:
- lang: eng
  text: The model of a ring threaded by the Aharonov-Bohm flux underlies our understanding
    of a coupling between gauge potentials and matter. The typical formulation of
    the model is based upon a single particle picture, and should be extended when
    interactions with other particles become relevant. Here, we illustrate such an
    extension for a particle in an Aharonov-Bohm ring subject to interactions with
    a weakly interacting Bose gas. We show that the ground state of the system can
    be described using the Bose-polaron concept—a particle dressed by interactions
    with a bosonic environment. We connect the energy spectrum to the effective mass
    of the polaron, and demonstrate how to change currents in the system by tuning
    boson-particle interactions. Our results suggest the Aharonov-Bohm ring as a platform
    for studying coherence and few- to many-body crossover of quasi-particles that
    arise from an impurity immersed in a medium.
acknowledgement: "Open Access funding enabled and organized by Projekt DEAL.\r\nWe
  would like to thank Jonas Jager for sharing his data with us in the early stages
  of this project. We thank Joachim Brand and Ray Yang for sharing with us data from
  Yang et al.46. This work has received funding from the DFG Project no. 413495248
  [VO 2437/1-1] (F.B., H.-W.H., A.G.V.). We acknowledge support from the Deutsche
  Forschungsgemeinschaft (DFG - German Research Foundation) and the Open Access Publishing
  Fund of the Technical University of Darmstadt."
article_number: '224'
article_processing_charge: Yes (via OA deal)
article_type: original
arxiv: 1
author:
- first_name: Fabian
  full_name: Brauneis, Fabian
  last_name: Brauneis
- first_name: Areg
  full_name: Ghazaryan, Areg
  id: 4AF46FD6-F248-11E8-B48F-1D18A9856A87
  last_name: Ghazaryan
  orcid: 0000-0001-9666-3543
- first_name: Hans-Werner
  full_name: Hammer, Hans-Werner
  last_name: Hammer
- first_name: Artem
  full_name: Volosniev, Artem
  id: 37D278BC-F248-11E8-B48F-1D18A9856A87
  last_name: Volosniev
  orcid: 0000-0003-0393-5525
citation:
  ama: Brauneis F, Ghazaryan A, Hammer H-W, Volosniev A. Emergence of a Bose polaron
    in a small ring threaded by the Aharonov-Bohm flux. <i>Communications Physics</i>.
    2023;6. doi:<a href="https://doi.org/10.1038/s42005-023-01281-2">10.1038/s42005-023-01281-2</a>
  apa: Brauneis, F., Ghazaryan, A., Hammer, H.-W., &#38; Volosniev, A. (2023). Emergence
    of a Bose polaron in a small ring threaded by the Aharonov-Bohm flux. <i>Communications
    Physics</i>. Springer Nature. <a href="https://doi.org/10.1038/s42005-023-01281-2">https://doi.org/10.1038/s42005-023-01281-2</a>
  chicago: Brauneis, Fabian, Areg Ghazaryan, Hans-Werner Hammer, and Artem Volosniev.
    “Emergence of a Bose Polaron in a Small Ring Threaded by the Aharonov-Bohm Flux.”
    <i>Communications Physics</i>. Springer Nature, 2023. <a href="https://doi.org/10.1038/s42005-023-01281-2">https://doi.org/10.1038/s42005-023-01281-2</a>.
  ieee: F. Brauneis, A. Ghazaryan, H.-W. Hammer, and A. Volosniev, “Emergence of a
    Bose polaron in a small ring threaded by the Aharonov-Bohm flux,” <i>Communications
    Physics</i>, vol. 6. Springer Nature, 2023.
  ista: Brauneis F, Ghazaryan A, Hammer H-W, Volosniev A. 2023. Emergence of a Bose
    polaron in a small ring threaded by the Aharonov-Bohm flux. Communications Physics.
    6, 224.
  mla: Brauneis, Fabian, et al. “Emergence of a Bose Polaron in a Small Ring Threaded
    by the Aharonov-Bohm Flux.” <i>Communications Physics</i>, vol. 6, 224, Springer
    Nature, 2023, doi:<a href="https://doi.org/10.1038/s42005-023-01281-2">10.1038/s42005-023-01281-2</a>.
  short: F. Brauneis, A. Ghazaryan, H.-W. Hammer, A. Volosniev, Communications Physics
    6 (2023).
date_created: 2023-08-28T12:36:49Z
date_published: 2023-08-22T00:00:00Z
date_updated: 2023-12-13T12:21:09Z
day: '22'
ddc:
- '530'
department:
- _id: MiLe
doi: 10.1038/s42005-023-01281-2
external_id:
  arxiv:
  - '2301.10488'
  isi:
  - '001052577500002'
file:
- access_level: open_access
  checksum: 6edfc59b0ee7dc406d0968b05236e83d
  content_type: application/pdf
  creator: dernst
  date_created: 2023-09-05T08:45:49Z
  date_updated: 2023-09-05T08:45:49Z
  file_id: '14268'
  file_name: 2023_CommPhysics_Brauneis.pdf
  file_size: 855960
  relation: main_file
  success: 1
file_date_updated: 2023-09-05T08:45:49Z
has_accepted_license: '1'
intvolume: '         6'
isi: 1
keyword:
- General Physics and Astronomy
language:
- iso: eng
month: '08'
oa: 1
oa_version: Published Version
publication: Communications Physics
publication_identifier:
  issn:
  - 2399-3650
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: Emergence of a Bose polaron in a small ring threaded by the Aharonov-Bohm flux
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 6
year: '2023'
...
---
_id: '12534'
abstract:
- lang: eng
  text: Brownian motion of a mobile impurity in a bath is affected by spin-orbit coupling
    (SOC). Here, we discuss a Caldeira-Leggett-type model that can be used to propose
    and interpret quantum simulators of this problem in cold Bose gases. First, we
    derive a master equation that describes the model and explore it in a one-dimensional
    (1D) setting. To validate the standard assumptions needed for our derivation,
    we analyze available experimental data without SOC; as a byproduct, this analysis
    suggests that the quench dynamics of the impurity is beyond the 1D Bose-polaron
    approach at temperatures currently accessible in a cold-atom laboratory—motion
    of the impurity is mainly driven by dissipation. For systems with SOC, we demonstrate
    that 1D spin-orbit coupling can be gauged out even in the presence of dissipation—the
    information about SOC is incorporated in the initial conditions. Observables sensitive
    to this information (such as spin densities) can be used to study formation of
    steady spin polarization domains during quench dynamics.
acknowledgement: "We thank Rafael Barfknecht for help at the initial stages of this
  project; Fabian Brauneis for useful discussions; Miguel A. Garcia-March, Georgios
  Koutentakis, and Simeon Mistakidis\r\nfor comments on the paper. M.L. acknowledges
  support by the European Research Council (ERC) Starting Grant No. 801770 (ANGULON)."
article_number: '013029'
article_processing_charge: No
article_type: original
author:
- first_name: Areg
  full_name: Ghazaryan, Areg
  id: 4AF46FD6-F248-11E8-B48F-1D18A9856A87
  last_name: Ghazaryan
  orcid: 0000-0001-9666-3543
- first_name: Alberto
  full_name: Cappellaro, Alberto
  id: 9d13b3cb-30a2-11eb-80dc-f772505e8660
  last_name: Cappellaro
  orcid: 0000-0001-6110-2359
- first_name: Mikhail
  full_name: Lemeshko, Mikhail
  id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
  last_name: Lemeshko
  orcid: 0000-0002-6990-7802
- first_name: Artem
  full_name: Volosniev, Artem
  id: 37D278BC-F248-11E8-B48F-1D18A9856A87
  last_name: Volosniev
  orcid: 0000-0003-0393-5525
citation:
  ama: Ghazaryan A, Cappellaro A, Lemeshko M, Volosniev A. Dissipative dynamics of
    an impurity with spin-orbit coupling. <i>Physical Review Research</i>. 2023;5(1).
    doi:<a href="https://doi.org/10.1103/physrevresearch.5.013029">10.1103/physrevresearch.5.013029</a>
  apa: Ghazaryan, A., Cappellaro, A., Lemeshko, M., &#38; Volosniev, A. (2023). Dissipative
    dynamics of an impurity with spin-orbit coupling. <i>Physical Review Research</i>.
    American Physical Society. <a href="https://doi.org/10.1103/physrevresearch.5.013029">https://doi.org/10.1103/physrevresearch.5.013029</a>
  chicago: Ghazaryan, Areg, Alberto Cappellaro, Mikhail Lemeshko, and Artem Volosniev.
    “Dissipative Dynamics of an Impurity with Spin-Orbit Coupling.” <i>Physical Review
    Research</i>. American Physical Society, 2023. <a href="https://doi.org/10.1103/physrevresearch.5.013029">https://doi.org/10.1103/physrevresearch.5.013029</a>.
  ieee: A. Ghazaryan, A. Cappellaro, M. Lemeshko, and A. Volosniev, “Dissipative dynamics
    of an impurity with spin-orbit coupling,” <i>Physical Review Research</i>, vol.
    5, no. 1. American Physical Society, 2023.
  ista: Ghazaryan A, Cappellaro A, Lemeshko M, Volosniev A. 2023. Dissipative dynamics
    of an impurity with spin-orbit coupling. Physical Review Research. 5(1), 013029.
  mla: Ghazaryan, Areg, et al. “Dissipative Dynamics of an Impurity with Spin-Orbit
    Coupling.” <i>Physical Review Research</i>, vol. 5, no. 1, 013029, American Physical
    Society, 2023, doi:<a href="https://doi.org/10.1103/physrevresearch.5.013029">10.1103/physrevresearch.5.013029</a>.
  short: A. Ghazaryan, A. Cappellaro, M. Lemeshko, A. Volosniev, Physical Review Research
    5 (2023).
date_created: 2023-02-10T09:02:26Z
date_published: 2023-01-20T00:00:00Z
date_updated: 2023-02-20T07:02:00Z
day: '20'
ddc:
- '530'
department:
- _id: MiLe
doi: 10.1103/physrevresearch.5.013029
ec_funded: 1
file:
- access_level: open_access
  checksum: 6068b62874c0099628a108bb9c5c6bd2
  content_type: application/pdf
  creator: dernst
  date_created: 2023-02-13T10:38:10Z
  date_updated: 2023-02-13T10:38:10Z
  file_id: '12546'
  file_name: 2023_PhysicalReviewResearch_Ghazaryan.pdf
  file_size: 865150
  relation: main_file
  success: 1
file_date_updated: 2023-02-13T10:38:10Z
has_accepted_license: '1'
intvolume: '         5'
issue: '1'
language:
- iso: eng
month: '01'
oa: 1
oa_version: Published Version
project:
- _id: 2688CF98-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '801770'
  name: 'Angulon: physics and applications of a new quasiparticle'
publication: Physical Review Research
publication_identifier:
  issn:
  - 2643-1564
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Dissipative dynamics of an impurity with spin-orbit coupling
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 5
year: '2023'
...
---
_id: '12723'
abstract:
- lang: eng
  text: 'Lead halide perovskites enjoy a number of remarkable optoelectronic properties.
    To explain their origin, it is necessary to study how electromagnetic fields interact
    with these systems. We address this problem here by studying two classical quantities:
    Faraday rotation and the complex refractive index in a paradigmatic perovskite
    CH3NH3PbBr3 in a broad wavelength range. We find that the minimal coupling of
    electromagnetic fields to the k⋅p Hamiltonian is insufficient to describe the
    observed data even on the qualitative level. To amend this, we demonstrate that
    there exists a relevant atomic-level coupling between electromagnetic fields and
    the spin degree of freedom. This spin-electric coupling allows for quantitative
    description of a number of previous as well as present experimental data. In particular,
    we use it here to show that the Faraday effect in lead halide perovskites is dominated
    by the Zeeman splitting of the energy levels and has a substantial beyond-Becquerel
    contribution. Finally, we present general symmetry-based phenomenological arguments
    that in the low-energy limit our effective model includes all basis coupling terms
    to the electromagnetic field in the linear order.'
article_number: '106901'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Artem
  full_name: Volosniev, Artem
  id: 37D278BC-F248-11E8-B48F-1D18A9856A87
  last_name: Volosniev
  orcid: 0000-0003-0393-5525
- first_name: Abhishek
  full_name: Shiva Kumar, Abhishek
  id: 5e9a6931-eb97-11eb-a6c2-e96f7058d77a
  last_name: Shiva Kumar
- first_name: Dusan
  full_name: Lorenc, Dusan
  id: 40D8A3E6-F248-11E8-B48F-1D18A9856A87
  last_name: Lorenc
- first_name: Younes
  full_name: Ashourishokri, Younes
  id: e32c111f-f6e0-11ea-865d-eb955baea334
  last_name: Ashourishokri
- first_name: Ayan A.
  full_name: Zhumekenov, Ayan A.
  last_name: Zhumekenov
- first_name: Osman M.
  full_name: Bakr, Osman M.
  last_name: Bakr
- first_name: Mikhail
  full_name: Lemeshko, Mikhail
  id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
  last_name: Lemeshko
  orcid: 0000-0002-6990-7802
- first_name: Zhanybek
  full_name: Alpichshev, Zhanybek
  id: 45E67A2A-F248-11E8-B48F-1D18A9856A87
  last_name: Alpichshev
  orcid: 0000-0002-7183-5203
citation:
  ama: Volosniev A, Shiva Kumar A, Lorenc D, et al. Spin-electric coupling in lead
    halide perovskites. <i>Physical Review Letters</i>. 2023;130(10). doi:<a href="https://doi.org/10.1103/physrevlett.130.106901">10.1103/physrevlett.130.106901</a>
  apa: Volosniev, A., Shiva Kumar, A., Lorenc, D., Ashourishokri, Y., Zhumekenov,
    A. A., Bakr, O. M., … Alpichshev, Z. (2023). Spin-electric coupling in lead halide
    perovskites. <i>Physical Review Letters</i>. American Physical Society. <a href="https://doi.org/10.1103/physrevlett.130.106901">https://doi.org/10.1103/physrevlett.130.106901</a>
  chicago: Volosniev, Artem, Abhishek Shiva Kumar, Dusan Lorenc, Younes Ashourishokri,
    Ayan A. Zhumekenov, Osman M. Bakr, Mikhail Lemeshko, and Zhanybek Alpichshev.
    “Spin-Electric Coupling in Lead Halide Perovskites.” <i>Physical Review Letters</i>.
    American Physical Society, 2023. <a href="https://doi.org/10.1103/physrevlett.130.106901">https://doi.org/10.1103/physrevlett.130.106901</a>.
  ieee: A. Volosniev <i>et al.</i>, “Spin-electric coupling in lead halide perovskites,”
    <i>Physical Review Letters</i>, vol. 130, no. 10. American Physical Society, 2023.
  ista: Volosniev A, Shiva Kumar A, Lorenc D, Ashourishokri Y, Zhumekenov AA, Bakr
    OM, Lemeshko M, Alpichshev Z. 2023. Spin-electric coupling in lead halide perovskites.
    Physical Review Letters. 130(10), 106901.
  mla: Volosniev, Artem, et al. “Spin-Electric Coupling in Lead Halide Perovskites.”
    <i>Physical Review Letters</i>, vol. 130, no. 10, 106901, American Physical Society,
    2023, doi:<a href="https://doi.org/10.1103/physrevlett.130.106901">10.1103/physrevlett.130.106901</a>.
  short: A. Volosniev, A. Shiva Kumar, D. Lorenc, Y. Ashourishokri, A.A. Zhumekenov,
    O.M. Bakr, M. Lemeshko, Z. Alpichshev, Physical Review Letters 130 (2023).
date_created: 2023-03-14T13:11:59Z
date_published: 2023-03-10T00:00:00Z
date_updated: 2023-08-01T13:39:04Z
day: '10'
department:
- _id: GradSch
- _id: ZhAl
- _id: MiLe
doi: 10.1103/physrevlett.130.106901
external_id:
  arxiv:
  - '2203.09443'
  isi:
  - '000982435900002'
intvolume: '       130'
isi: 1
issue: '10'
keyword:
- General Physics and Astronomy
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.48550/arXiv.2203.09443
month: '03'
oa: 1
oa_version: Preprint
publication: Physical Review Letters
publication_identifier:
  eissn:
  - 1079-7114
  issn:
  - 0031-9007
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Spin-electric coupling in lead halide perovskites
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 130
year: '2023'
...
---
_id: '12724'
abstract:
- lang: eng
  text: 'We use general symmetry-based arguments to construct an effective model suitable
    for studying optical properties of lead halide perovskites. To build the model,
    we identify an atomic-level interaction between electromagnetic fields and the
    spin degree of freedom that should be added to a minimally coupled k⋅p Hamiltonian.
    As a first application, we study two basic optical characteristics of the material:
    the Verdet constant and the refractive index. Beyond these linear characteristics
    of the material, the model is suitable for calculating nonlinear effects such
    as the third-order optical susceptibility. Analysis of this quantity shows that
    the geometrical properties of the spin-electric term imply isotropic optical response
    of the system, and that optical anisotropy of lead halide perovskites is a manifestation
    of hopping of charge carriers. To illustrate this, we discuss third-harmonic generation.'
article_number: '125201'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Artem
  full_name: Volosniev, Artem
  id: 37D278BC-F248-11E8-B48F-1D18A9856A87
  last_name: Volosniev
  orcid: 0000-0003-0393-5525
- first_name: Abhishek
  full_name: Shiva Kumar, Abhishek
  id: 5e9a6931-eb97-11eb-a6c2-e96f7058d77a
  last_name: Shiva Kumar
- first_name: Dusan
  full_name: Lorenc, Dusan
  id: 40D8A3E6-F248-11E8-B48F-1D18A9856A87
  last_name: Lorenc
- first_name: Younes
  full_name: Ashourishokri, Younes
  id: e32c111f-f6e0-11ea-865d-eb955baea334
  last_name: Ashourishokri
- first_name: Ayan
  full_name: Zhumekenov, Ayan
  last_name: Zhumekenov
- first_name: Osman M.
  full_name: Bakr, Osman M.
  last_name: Bakr
- first_name: Mikhail
  full_name: Lemeshko, Mikhail
  id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
  last_name: Lemeshko
  orcid: 0000-0002-6990-7802
- first_name: Zhanybek
  full_name: Alpichshev, Zhanybek
  id: 45E67A2A-F248-11E8-B48F-1D18A9856A87
  last_name: Alpichshev
  orcid: 0000-0002-7183-5203
citation:
  ama: Volosniev A, Shiva Kumar A, Lorenc D, et al. Effective model for studying optical
    properties of lead halide perovskites. <i>Physical Review B</i>. 2023;107(12).
    doi:<a href="https://doi.org/10.1103/physrevb.107.125201">10.1103/physrevb.107.125201</a>
  apa: Volosniev, A., Shiva Kumar, A., Lorenc, D., Ashourishokri, Y., Zhumekenov,
    A., Bakr, O. M., … Alpichshev, Z. (2023). Effective model for studying optical
    properties of lead halide perovskites. <i>Physical Review B</i>. American Physical
    Society. <a href="https://doi.org/10.1103/physrevb.107.125201">https://doi.org/10.1103/physrevb.107.125201</a>
  chicago: Volosniev, Artem, Abhishek Shiva Kumar, Dusan Lorenc, Younes Ashourishokri,
    Ayan Zhumekenov, Osman M. Bakr, Mikhail Lemeshko, and Zhanybek Alpichshev. “Effective
    Model for Studying Optical Properties of Lead Halide Perovskites.” <i>Physical
    Review B</i>. American Physical Society, 2023. <a href="https://doi.org/10.1103/physrevb.107.125201">https://doi.org/10.1103/physrevb.107.125201</a>.
  ieee: A. Volosniev <i>et al.</i>, “Effective model for studying optical properties
    of lead halide perovskites,” <i>Physical Review B</i>, vol. 107, no. 12. American
    Physical Society, 2023.
  ista: Volosniev A, Shiva Kumar A, Lorenc D, Ashourishokri Y, Zhumekenov A, Bakr
    OM, Lemeshko M, Alpichshev Z. 2023. Effective model for studying optical properties
    of lead halide perovskites. Physical Review B. 107(12), 125201.
  mla: Volosniev, Artem, et al. “Effective Model for Studying Optical Properties of
    Lead Halide Perovskites.” <i>Physical Review B</i>, vol. 107, no. 12, 125201,
    American Physical Society, 2023, doi:<a href="https://doi.org/10.1103/physrevb.107.125201">10.1103/physrevb.107.125201</a>.
  short: A. Volosniev, A. Shiva Kumar, D. Lorenc, Y. Ashourishokri, A. Zhumekenov,
    O.M. Bakr, M. Lemeshko, Z. Alpichshev, Physical Review B 107 (2023).
date_created: 2023-03-14T13:13:05Z
date_published: 2023-03-15T00:00:00Z
date_updated: 2023-08-01T13:39:47Z
day: '15'
department:
- _id: GradSch
- _id: ZhAl
- _id: MiLe
doi: 10.1103/physrevb.107.125201
external_id:
  arxiv:
  - '2204.04022'
  isi:
  - '000972602200006'
intvolume: '       107'
isi: 1
issue: '12'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.48550/arXiv.2204.04022
month: '03'
oa: 1
oa_version: Preprint
publication: Physical Review B
publication_identifier:
  eissn:
  - 2469-9969
  issn:
  - 2469-9950
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Effective model for studying optical properties of lead halide perovskites
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 107
year: '2023'
...
---
_id: '12788'
abstract:
- lang: eng
  text: We show that the simplest of existing molecules—closed-shell diatomics not
    interacting with one another—host topological charges when driven by periodic
    far-off-resonant laser pulses. A periodically kicked molecular rotor can be mapped
    onto a “crystalline” lattice in angular momentum space. This allows us to define
    quasimomenta and the band structure in the Floquet representation, by analogy
    with the Bloch waves of solid-state physics. Applying laser pulses spaced by 1/3
    of the molecular rotational period creates a lattice with three atoms per unit
    cell with staggered hopping. Within the synthetic dimension of the laser strength,
    we discover Dirac cones with topological charges. These Dirac cones, topologically
    protected by reflection and time-reversal symmetry, are reminiscent of (although
    not equivalent to) that seen in graphene. They—and the corresponding edge states—are
    broadly tunable by adjusting the laser strength and can be observed in present-day
    experiments by measuring molecular alignment and populations of rotational levels.
    This paves the way to study controllable topological physics in gas-phase experiments
    with small molecules as well as to classify dynamical molecular states by their
    topological invariants.
acknowledgement: M. L. acknowledges support by the European Research Council (ERC)
  Starting Grant No. 801770 (ANGULON).
article_number: '103202'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Volker
  full_name: Karle, Volker
  id: D7C012AE-D7ED-11E9-95E8-1EC5E5697425
  last_name: Karle
- first_name: Areg
  full_name: Ghazaryan, Areg
  id: 4AF46FD6-F248-11E8-B48F-1D18A9856A87
  last_name: Ghazaryan
  orcid: 0000-0001-9666-3543
- first_name: Mikhail
  full_name: Lemeshko, Mikhail
  id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
  last_name: Lemeshko
  orcid: 0000-0002-6990-7802
citation:
  ama: Karle V, Ghazaryan A, Lemeshko M. Topological charges of periodically kicked
    molecules. <i>Physical Review Letters</i>. 2023;130(10). doi:<a href="https://doi.org/10.1103/PhysRevLett.130.103202">10.1103/PhysRevLett.130.103202</a>
  apa: Karle, V., Ghazaryan, A., &#38; Lemeshko, M. (2023). Topological charges of
    periodically kicked molecules. <i>Physical Review Letters</i>. American Physical
    Society. <a href="https://doi.org/10.1103/PhysRevLett.130.103202">https://doi.org/10.1103/PhysRevLett.130.103202</a>
  chicago: Karle, Volker, Areg Ghazaryan, and Mikhail Lemeshko. “Topological Charges
    of Periodically Kicked Molecules.” <i>Physical Review Letters</i>. American Physical
    Society, 2023. <a href="https://doi.org/10.1103/PhysRevLett.130.103202">https://doi.org/10.1103/PhysRevLett.130.103202</a>.
  ieee: V. Karle, A. Ghazaryan, and M. Lemeshko, “Topological charges of periodically
    kicked molecules,” <i>Physical Review Letters</i>, vol. 130, no. 10. American
    Physical Society, 2023.
  ista: Karle V, Ghazaryan A, Lemeshko M. 2023. Topological charges of periodically
    kicked molecules. Physical Review Letters. 130(10), 103202.
  mla: Karle, Volker, et al. “Topological Charges of Periodically Kicked Molecules.”
    <i>Physical Review Letters</i>, vol. 130, no. 10, 103202, American Physical Society,
    2023, doi:<a href="https://doi.org/10.1103/PhysRevLett.130.103202">10.1103/PhysRevLett.130.103202</a>.
  short: V. Karle, A. Ghazaryan, M. Lemeshko, Physical Review Letters 130 (2023).
date_created: 2023-04-02T22:01:10Z
date_published: 2023-03-10T00:00:00Z
date_updated: 2023-08-01T14:02:06Z
day: '10'
department:
- _id: MiLe
doi: 10.1103/PhysRevLett.130.103202
ec_funded: 1
external_id:
  arxiv:
  - '2206.07067'
  isi:
  - '000957635500003'
intvolume: '       130'
isi: 1
issue: '10'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.48550/arXiv.2206.07067
month: '03'
oa: 1
oa_version: Preprint
project:
- _id: 2688CF98-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '801770'
  name: 'Angulon: physics and applications of a new quasiparticle'
publication: Physical Review Letters
publication_identifier:
  eissn:
  - 1079-7114
  issn:
  - 0031-9007
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
related_material:
  link:
  - description: News on the ISTA website
    relation: press_release
    url: https://ista.ac.at/en/news/topology-of-rotating-molecules/
scopus_import: '1'
status: public
title: Topological charges of periodically kicked molecules
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 130
year: '2023'
...
---
_id: '12790'
abstract:
- lang: eng
  text: Motivated by the recent discoveries of superconductivity in bilayer and trilayer
    graphene, we theoretically investigate superconductivity and other interaction-driven
    phases in multilayer graphene stacks. To this end, we study the density of states
    of multilayer graphene with up to four layers at the single-particle band structure
    level in the presence of a transverse electric field. Among the considered structures,
    tetralayer graphene with rhombohedral (ABCA) stacking reaches the highest density
    of states. We study the phases that can arise in ABCA graphene by tuning the carrier
    density and transverse electric field. For a broad region of the tuning parameters,
    the presence of strong Coulomb repulsion leads to a spontaneous spin and valley
    symmetry breaking via Stoner transitions. Using a model that incorporates the
    spontaneous spin and valley polarization, we explore the Kohn-Luttinger mechanism
    for superconductivity driven by repulsive Coulomb interactions. We find that the
    strongest superconducting instability is in the p-wave channel, and occurs in
    proximity to the onset of Stoner transitions. Interestingly, we find a range of
    densities and transverse electric fields where superconductivity develops out
    of a strongly corrugated, singly connected Fermi surface in each valley, leading
    to a topologically nontrivial chiral p+ip superconducting state with an even number
    of copropagating chiral Majorana edge modes. Our work establishes ABCA-stacked
    tetralayer graphene as a promising platform for observing strongly correlated
    physics and topological superconductivity.
acknowledgement: E.B. and T.H. were supported by the European Research Council (ERC)
  under grant HQMAT (Grant Agreement No. 817799), by the Israel-USA Binational Science
  Foundation (BSF), and by a Research grant from Irving and Cherna Moskowitz.
article_number: '104502'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Areg
  full_name: Ghazaryan, Areg
  id: 4AF46FD6-F248-11E8-B48F-1D18A9856A87
  last_name: Ghazaryan
  orcid: 0000-0001-9666-3543
- first_name: Tobias
  full_name: Holder, Tobias
  last_name: Holder
- first_name: Erez
  full_name: Berg, Erez
  last_name: Berg
- first_name: Maksym
  full_name: Serbyn, Maksym
  id: 47809E7E-F248-11E8-B48F-1D18A9856A87
  last_name: Serbyn
  orcid: 0000-0002-2399-5827
citation:
  ama: Ghazaryan A, Holder T, Berg E, Serbyn M. Multilayer graphenes as a platform
    for interaction-driven physics and topological superconductivity. <i>Physical
    Review B</i>. 2023;107(10). doi:<a href="https://doi.org/10.1103/PhysRevB.107.104502">10.1103/PhysRevB.107.104502</a>
  apa: Ghazaryan, A., Holder, T., Berg, E., &#38; Serbyn, M. (2023). Multilayer graphenes
    as a platform for interaction-driven physics and topological superconductivity.
    <i>Physical Review B</i>. American Physical Society. <a href="https://doi.org/10.1103/PhysRevB.107.104502">https://doi.org/10.1103/PhysRevB.107.104502</a>
  chicago: Ghazaryan, Areg, Tobias Holder, Erez Berg, and Maksym Serbyn. “Multilayer
    Graphenes as a Platform for Interaction-Driven Physics and Topological Superconductivity.”
    <i>Physical Review B</i>. American Physical Society, 2023. <a href="https://doi.org/10.1103/PhysRevB.107.104502">https://doi.org/10.1103/PhysRevB.107.104502</a>.
  ieee: A. Ghazaryan, T. Holder, E. Berg, and M. Serbyn, “Multilayer graphenes as
    a platform for interaction-driven physics and topological superconductivity,”
    <i>Physical Review B</i>, vol. 107, no. 10. American Physical Society, 2023.
  ista: Ghazaryan A, Holder T, Berg E, Serbyn M. 2023. Multilayer graphenes as a platform
    for interaction-driven physics and topological superconductivity. Physical Review
    B. 107(10), 104502.
  mla: Ghazaryan, Areg, et al. “Multilayer Graphenes as a Platform for Interaction-Driven
    Physics and Topological Superconductivity.” <i>Physical Review B</i>, vol. 107,
    no. 10, 104502, American Physical Society, 2023, doi:<a href="https://doi.org/10.1103/PhysRevB.107.104502">10.1103/PhysRevB.107.104502</a>.
  short: A. Ghazaryan, T. Holder, E. Berg, M. Serbyn, Physical Review B 107 (2023).
date_created: 2023-04-02T22:01:10Z
date_published: 2023-03-01T00:00:00Z
date_updated: 2023-08-01T13:59:29Z
day: '01'
department:
- _id: MaSe
- _id: MiLe
doi: 10.1103/PhysRevB.107.104502
external_id:
  arxiv:
  - '2211.02492'
  isi:
  - '000945526400003'
intvolume: '       107'
isi: 1
issue: '10'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.48550/arXiv.2211.02492
month: '03'
oa: 1
oa_version: Preprint
publication: Physical Review B
publication_identifier:
  eissn:
  - 2469-9969
  issn:
  - 2469-9950
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
related_material:
  link:
  - description: News on the ISTA website
    relation: press_release
    url: https://ista.ac.at/en/news/reaching-superconductivity-layer-by-layer/
scopus_import: '1'
status: public
title: Multilayer graphenes as a platform for interaction-driven physics and topological
  superconductivity
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 107
year: '2023'
...
---
_id: '12831'
abstract:
- lang: eng
  text: The angulon, a quasiparticle formed by a quantum rotor dressed by the excitations
    of a many-body bath, can be used to describe an impurity rotating in a fluid or
    solid environment. Here, we propose a coherent state ansatz in the co-rotating
    frame, which provides a comprehensive theoretical description of angulons. We
    reveal the quasiparticle properties, such as energies, quasiparticle weights,
    and spectral functions, and show that our ansatz yields a persistent decrease
    in the impurity’s rotational constant due to many-body dressing, which is consistent
    with experimental observations. From our study, a picture of the angulon emerges
    as an effective spin interacting with a magnetic field that is self-consistently
    generated by the molecule’s rotation. Moreover, we discuss rotational spectroscopy,
    which focuses on the response of rotating molecules to a laser perturbation in
    the linear response regime. Importantly, we take into account initial-state interactions
    that have been neglected in prior studies and reveal their impact on the excitation
    spectrum. To examine the angulon instability regime, we use a single-excitation
    ansatz and obtain results consistent with experiments, in which a broadening of
    spectral lines is observed while phonon wings remain highly suppressed due to
    initial-state interactions.
acknowledgement: We thank Ignacio Cirac, Christian Schmauder, and Henrik Stapelfeldt
  for their valuable discussions. We acknowledge support by the Max Planck Society
  and the Deutsche Forschungsgemeinschaft under Germany’s Excellence Strategy EXC
  2181/1—390900948 (the Heidelberg STRUCTURES Excellence Cluster). M.L. acknowledges
  support from the European Research Council (ERC) Starting Grant No. 801770 (ANGULON).
  T.S. is supported by the National Key Research and Development Program of China
  (Grant No. 2017YFA0718304) and the National Natural Science Foundation of China
  (Grant Nos. 11974363, 12135018, and 12047503).
article_number: '134301'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Zhongda
  full_name: Zeng, Zhongda
  last_name: Zeng
- first_name: Enderalp
  full_name: Yakaboylu, Enderalp
  id: 38CB71F6-F248-11E8-B48F-1D18A9856A87
  last_name: Yakaboylu
  orcid: 0000-0001-5973-0874
- first_name: Mikhail
  full_name: Lemeshko, Mikhail
  id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
  last_name: Lemeshko
  orcid: 0000-0002-6990-7802
- first_name: Tao
  full_name: Shi, Tao
  last_name: Shi
- first_name: Richard
  full_name: Schmidt, Richard
  last_name: Schmidt
citation:
  ama: Zeng Z, Yakaboylu E, Lemeshko M, Shi T, Schmidt R. Variational theory of angulons
    and their rotational spectroscopy. <i>The Journal of Chemical Physics</i>. 2023;158(13).
    doi:<a href="https://doi.org/10.1063/5.0135893">10.1063/5.0135893</a>
  apa: Zeng, Z., Yakaboylu, E., Lemeshko, M., Shi, T., &#38; Schmidt, R. (2023). Variational
    theory of angulons and their rotational spectroscopy. <i>The Journal of Chemical
    Physics</i>. American Institute of Physics. <a href="https://doi.org/10.1063/5.0135893">https://doi.org/10.1063/5.0135893</a>
  chicago: Zeng, Zhongda, Enderalp Yakaboylu, Mikhail Lemeshko, Tao Shi, and Richard
    Schmidt. “Variational Theory of Angulons and Their Rotational Spectroscopy.” <i>The
    Journal of Chemical Physics</i>. American Institute of Physics, 2023. <a href="https://doi.org/10.1063/5.0135893">https://doi.org/10.1063/5.0135893</a>.
  ieee: Z. Zeng, E. Yakaboylu, M. Lemeshko, T. Shi, and R. Schmidt, “Variational theory
    of angulons and their rotational spectroscopy,” <i>The Journal of Chemical Physics</i>,
    vol. 158, no. 13. American Institute of Physics, 2023.
  ista: Zeng Z, Yakaboylu E, Lemeshko M, Shi T, Schmidt R. 2023. Variational theory
    of angulons and their rotational spectroscopy. The Journal of Chemical Physics.
    158(13), 134301.
  mla: Zeng, Zhongda, et al. “Variational Theory of Angulons and Their Rotational
    Spectroscopy.” <i>The Journal of Chemical Physics</i>, vol. 158, no. 13, 134301,
    American Institute of Physics, 2023, doi:<a href="https://doi.org/10.1063/5.0135893">10.1063/5.0135893</a>.
  short: Z. Zeng, E. Yakaboylu, M. Lemeshko, T. Shi, R. Schmidt, The Journal of Chemical
    Physics 158 (2023).
date_created: 2023-04-16T22:01:07Z
date_published: 2023-04-07T00:00:00Z
date_updated: 2023-08-01T14:08:47Z
day: '07'
ddc:
- '530'
department:
- _id: MiLe
doi: 10.1063/5.0135893
ec_funded: 1
external_id:
  arxiv:
  - '2211.08070'
  isi:
  - '000970038800001'
file:
- access_level: open_access
  checksum: 8d801babea4df48e08895c76571bb19e
  content_type: application/pdf
  creator: dernst
  date_created: 2023-04-17T07:28:38Z
  date_updated: 2023-04-17T07:28:38Z
  file_id: '12841'
  file_name: 2023_JourChemicalPhysics_Zeng.pdf
  file_size: 7388057
  relation: main_file
  success: 1
file_date_updated: 2023-04-17T07:28:38Z
has_accepted_license: '1'
intvolume: '       158'
isi: 1
issue: '13'
language:
- iso: eng
month: '04'
oa: 1
oa_version: Published Version
project:
- _id: 2688CF98-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '801770'
  name: 'Angulon: physics and applications of a new quasiparticle'
publication: The Journal of Chemical Physics
publication_identifier:
  eissn:
  - 1089-7690
publication_status: published
publisher: American Institute of Physics
quality_controlled: '1'
scopus_import: '1'
status: public
title: Variational theory of angulons and their rotational spectroscopy
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 158
year: '2023'
...
---
_id: '12836'
abstract:
- lang: eng
  text: Coherent control and manipulation of quantum degrees of freedom such as spins
    forms the basis of emerging quantum technologies. In this context, the robust
    valley degree of freedom and the associated valley pseudospin found in two-dimensional
    transition metal dichalcogenides is a highly attractive platform. Valley polarization
    and coherent superposition of valley states have been observed in these systems
    even up to room temperature. Control of valley coherence is an important building
    block for the implementation of valley qubit. Large magnetic fields or high-power
    lasers have been used in the past to demonstrate the control (initialization and
    rotation) of the valley coherent states. Here, the control of layer–valley coherence
    via strong coupling of valley excitons in bilayer WS2 to microcavity photons is
    demonstrated by exploiting the pseudomagnetic field arising in optical cavities
    owing to the transverse electric–transverse magnetic (TE–TM)mode splitting. The
    use of photonic structures to generate pseudomagnetic fields which can be used
    to manipulate exciton-polaritons presents an attractive approach to control optical
    responses without the need for large magnets or high-intensity optical pump powers.
acknowledgement: The authors acknowledge insightful discussions with Prof. Wang Yao
  and graphics by Rezlind Bushati. M.K. and N.Y. acknowledge support from NSF grants
  NSF DMR-1709996 and NSF OMA 1936276. S.G. was supported by the Army Research Office
  Multidisciplinary University Research Initiative program (W911NF-17-1-0312) and
  V.M.M. by the Army Research Office grant (W911NF-22-1-0091). K.M acknowledges the
  SPARC program that supported his collaboration with the CUNY team. The authors acknowledge
  the Nanofabrication facility at the CUNY Advanced Science Research Center where
  the cavity devices were fabricated.
article_number: '2202631'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Mandeep
  full_name: Khatoniar, Mandeep
  last_name: Khatoniar
- first_name: Nicholas
  full_name: Yama, Nicholas
  last_name: Yama
- first_name: Areg
  full_name: Ghazaryan, Areg
  id: 4AF46FD6-F248-11E8-B48F-1D18A9856A87
  last_name: Ghazaryan
  orcid: 0000-0001-9666-3543
- first_name: Sriram
  full_name: Guddala, Sriram
  last_name: Guddala
- first_name: Pouyan
  full_name: Ghaemi, Pouyan
  last_name: Ghaemi
- first_name: Kausik
  full_name: Majumdar, Kausik
  last_name: Majumdar
- first_name: Vinod
  full_name: Menon, Vinod
  last_name: Menon
citation:
  ama: Khatoniar M, Yama N, Ghazaryan A, et al. Optical manipulation of Layer–Valley
    coherence via strong exciton–photon coupling in microcavities. <i>Advanced Optical
    Materials</i>. 2023;11(13). doi:<a href="https://doi.org/10.1002/adom.202202631">10.1002/adom.202202631</a>
  apa: Khatoniar, M., Yama, N., Ghazaryan, A., Guddala, S., Ghaemi, P., Majumdar,
    K., &#38; Menon, V. (2023). Optical manipulation of Layer–Valley coherence via
    strong exciton–photon coupling in microcavities. <i>Advanced Optical Materials</i>.
    Wiley. <a href="https://doi.org/10.1002/adom.202202631">https://doi.org/10.1002/adom.202202631</a>
  chicago: Khatoniar, Mandeep, Nicholas Yama, Areg Ghazaryan, Sriram Guddala, Pouyan
    Ghaemi, Kausik Majumdar, and Vinod Menon. “Optical Manipulation of Layer–Valley
    Coherence via Strong Exciton–Photon Coupling in Microcavities.” <i>Advanced Optical
    Materials</i>. Wiley, 2023. <a href="https://doi.org/10.1002/adom.202202631">https://doi.org/10.1002/adom.202202631</a>.
  ieee: M. Khatoniar <i>et al.</i>, “Optical manipulation of Layer–Valley coherence
    via strong exciton–photon coupling in microcavities,” <i>Advanced Optical Materials</i>,
    vol. 11, no. 13. Wiley, 2023.
  ista: Khatoniar M, Yama N, Ghazaryan A, Guddala S, Ghaemi P, Majumdar K, Menon V.
    2023. Optical manipulation of Layer–Valley coherence via strong exciton–photon
    coupling in microcavities. Advanced Optical Materials. 11(13), 2202631.
  mla: Khatoniar, Mandeep, et al. “Optical Manipulation of Layer–Valley Coherence
    via Strong Exciton–Photon Coupling in Microcavities.” <i>Advanced Optical Materials</i>,
    vol. 11, no. 13, 2202631, Wiley, 2023, doi:<a href="https://doi.org/10.1002/adom.202202631">10.1002/adom.202202631</a>.
  short: M. Khatoniar, N. Yama, A. Ghazaryan, S. Guddala, P. Ghaemi, K. Majumdar,
    V. Menon, Advanced Optical Materials 11 (2023).
date_created: 2023-04-16T22:01:09Z
date_published: 2023-07-04T00:00:00Z
date_updated: 2023-10-04T11:15:17Z
day: '04'
department:
- _id: MiLe
doi: 10.1002/adom.202202631
external_id:
  arxiv:
  - '2211.08755'
  isi:
  - '000963866700001'
intvolume: '        11'
isi: 1
issue: '13'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.48550/arXiv.2211.08755
month: '07'
oa: 1
oa_version: Preprint
publication: Advanced Optical Materials
publication_identifier:
  eissn:
  - 2195-1071
publication_status: published
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: Optical manipulation of Layer–Valley coherence via strong exciton–photon coupling
  in microcavities
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 11
year: '2023'
...
---
_id: '12914'
abstract:
- lang: eng
  text: We numerically study two methods of measuring tunneling times using a quantum
    clock. In the conventional method using the Larmor clock, we show that the Larmor
    tunneling time can be shorter for higher tunneling barriers. In the second method,
    we study the probability of a spin-flip of a particle when it is transmitted through
    a potential barrier including a spatially rotating field interacting with its
    spin. According to the adiabatic theorem, the probability depends on the velocity
    of the particle inside the barrier. It is numerically observed that the probability
    increases for higher barriers, which is consistent with the result obtained by
    the Larmor clock. By comparing outcomes for different initial spin states, we
    suggest that one of the main causes of the apparent decrease in the tunneling
    time can be the filtering effect occurring at the end of the barrier.
acknowledgement: We thank W. H. Zurek, N. Sinitsyn, M. O. Scully, M. Arndt, and C.
  H. Marrows for helpful discussions. F.S. acknowledges support from the Los Alamos
  National Laboratory LDRD program under Project No. 20230049DR and the Center for
  Nonlinear Studies. F.S. also thanks the European Union’s Horizon 2020 research and
  innovation program under the Marie Skłodowska-Curie Grant No. 754411 for support.
  W.G.U. thanks the Natural Science and Engineering Research Council of Canada, the
  Hagler Institute of Texas A&M University, the Helmholz Inst HZDR, Germany for support
  while this work was being done.
article_number: '042216'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Fumika
  full_name: Suzuki, Fumika
  id: 650C99FC-1079-11EA-A3C0-73AE3DDC885E
  last_name: Suzuki
  orcid: 0000-0003-4982-5970
- first_name: William G.
  full_name: Unruh, William G.
  last_name: Unruh
citation:
  ama: Suzuki F, Unruh WG. Numerical quantum clock simulations for measuring tunneling
    times. <i>Physical Review A</i>. 2023;107(4). doi:<a href="https://doi.org/10.1103/PhysRevA.107.042216">10.1103/PhysRevA.107.042216</a>
  apa: Suzuki, F., &#38; Unruh, W. G. (2023). Numerical quantum clock simulations
    for measuring tunneling times. <i>Physical Review A</i>. American Physical Society.
    <a href="https://doi.org/10.1103/PhysRevA.107.042216">https://doi.org/10.1103/PhysRevA.107.042216</a>
  chicago: Suzuki, Fumika, and William G. Unruh. “Numerical Quantum Clock Simulations
    for Measuring Tunneling Times.” <i>Physical Review A</i>. American Physical Society,
    2023. <a href="https://doi.org/10.1103/PhysRevA.107.042216">https://doi.org/10.1103/PhysRevA.107.042216</a>.
  ieee: F. Suzuki and W. G. Unruh, “Numerical quantum clock simulations for measuring
    tunneling times,” <i>Physical Review A</i>, vol. 107, no. 4. American Physical
    Society, 2023.
  ista: Suzuki F, Unruh WG. 2023. Numerical quantum clock simulations for measuring
    tunneling times. Physical Review A. 107(4), 042216.
  mla: Suzuki, Fumika, and William G. Unruh. “Numerical Quantum Clock Simulations
    for Measuring Tunneling Times.” <i>Physical Review A</i>, vol. 107, no. 4, 042216,
    American Physical Society, 2023, doi:<a href="https://doi.org/10.1103/PhysRevA.107.042216">10.1103/PhysRevA.107.042216</a>.
  short: F. Suzuki, W.G. Unruh, Physical Review A 107 (2023).
date_created: 2023-05-07T22:01:03Z
date_published: 2023-04-20T00:00:00Z
date_updated: 2023-08-01T14:33:21Z
day: '20'
department:
- _id: MiLe
doi: 10.1103/PhysRevA.107.042216
ec_funded: 1
external_id:
  arxiv:
  - '2207.13130'
  isi:
  - '000975799300006'
intvolume: '       107'
isi: 1
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.48550/arXiv.2207.13130
month: '04'
oa: 1
oa_version: Preprint
project:
- _id: 260C2330-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '754411'
  name: ISTplus - Postdoctoral Fellowships
publication: Physical Review A
publication_identifier:
  eissn:
  - 2469-9934
  issn:
  - 2469-9926
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Numerical quantum clock simulations for measuring tunneling times
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 107
year: '2023'
...
---
_id: '10759'
abstract:
- lang: eng
  text: In this Thesis, I study composite quantum impurities with variational techniques,
    both inspired by machine learning as well as fully analytic. I supplement this
    with exploration of other applications of machine learning, in particular artificial
    neural networks, in many-body physics. In Chapters 3 and 4, I study quasiparticle
    systems with variational approach. I derive a Hamiltonian describing the angulon
    quasiparticle in the presence of a magnetic field. I apply analytic variational
    treatment to this Hamiltonian. Then, I introduce a variational approach for non-additive
    systems, based on artificial neural networks. I exemplify this approach on the
    example of the polaron quasiparticle (Fröhlich Hamiltonian). In Chapter 5, I continue
    using artificial neural networks, albeit in a different setting. I apply artificial
    neural networks to detect phases from snapshots of two types physical systems.
    Namely, I study Monte Carlo snapshots of multilayer classical spin models as well
    as molecular dynamics maps of colloidal systems. The main type of networks that
    I use here are convolutional neural networks, known for their applicability to
    image data.
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Wojciech
  full_name: Rzadkowski, Wojciech
  id: 48C55298-F248-11E8-B48F-1D18A9856A87
  last_name: Rzadkowski
  orcid: 0000-0002-1106-4419
citation:
  ama: Rzadkowski W. Analytic and machine learning approaches to composite quantum
    impurities. 2022. doi:<a href="https://doi.org/10.15479/at:ista:10759">10.15479/at:ista:10759</a>
  apa: Rzadkowski, W. (2022). <i>Analytic and machine learning approaches to composite
    quantum impurities</i>. Institute of Science and Technology Austria. <a href="https://doi.org/10.15479/at:ista:10759">https://doi.org/10.15479/at:ista:10759</a>
  chicago: Rzadkowski, Wojciech. “Analytic and Machine Learning Approaches to Composite
    Quantum Impurities.” Institute of Science and Technology Austria, 2022. <a href="https://doi.org/10.15479/at:ista:10759">https://doi.org/10.15479/at:ista:10759</a>.
  ieee: W. Rzadkowski, “Analytic and machine learning approaches to composite quantum
    impurities,” Institute of Science and Technology Austria, 2022.
  ista: Rzadkowski W. 2022. Analytic and machine learning approaches to composite
    quantum impurities. Institute of Science and Technology Austria.
  mla: Rzadkowski, Wojciech. <i>Analytic and Machine Learning Approaches to Composite
    Quantum Impurities</i>. Institute of Science and Technology Austria, 2022, doi:<a
    href="https://doi.org/10.15479/at:ista:10759">10.15479/at:ista:10759</a>.
  short: W. Rzadkowski, Analytic and Machine Learning Approaches to Composite Quantum
    Impurities, Institute of Science and Technology Austria, 2022.
date_created: 2022-02-16T13:27:37Z
date_published: 2022-02-21T00:00:00Z
date_updated: 2024-08-07T07:16:53Z
day: '21'
ddc:
- '530'
degree_awarded: PhD
department:
- _id: GradSch
- _id: MiLe
doi: 10.15479/at:ista:10759
ec_funded: 1
file:
- access_level: closed
  checksum: 0fc54ad1eaede879c665ac9b53c93e22
  content_type: application/zip
  creator: wrzadkow
  date_created: 2022-02-21T13:58:16Z
  date_updated: 2022-02-22T07:20:12Z
  file_id: '10785'
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  file_size: 17668233
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  creator: wrzadkow
  date_created: 2022-02-21T14:02:54Z
  date_updated: 2022-02-21T14:02:54Z
  file_id: '10786'
  file_name: Rzadkowski_thesis_final.pdf
  file_size: 13307331
  relation: main_file
  success: 1
file_date_updated: 2022-02-22T07:20:12Z
has_accepted_license: '1'
language:
- iso: eng
month: '02'
oa: 1
oa_version: Published Version
page: '120'
project:
- _id: 2564DBCA-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '665385'
  name: International IST Doctoral Program
publication_identifier:
  issn:
  - 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
related_material:
  record:
  - id: '10762'
    relation: part_of_dissertation
    status: public
  - id: '7956'
    relation: part_of_dissertation
    status: public
  - id: '415'
    relation: part_of_dissertation
    status: public
  - id: '8644'
    relation: part_of_dissertation
    status: public
status: public
supervisor:
- first_name: Mikhail
  full_name: Lemeshko, Mikhail
  id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
  last_name: Lemeshko
  orcid: 0000-0002-6990-7802
title: Analytic and machine learning approaches to composite quantum impurities
type: dissertation
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
year: '2022'
...
---
_id: '10771'
abstract:
- lang: eng
  text: A critical overview of the theory of the chirality-induced spin selectivity
    (CISS) effect, that is, phenomena in which the chirality of molecular species
    imparts significant spin selectivity to various electron processes, is provided.
    Based on discussions in a recently held workshop, and further work published since,
    the status of CISS effects—in electron transmission, electron transport, and chemical
    reactions—is reviewed. For each, a detailed discussion of the state-of-the-art
    in theoretical understanding is provided and remaining challenges and research
    opportunities are identified.
article_number: '2106629'
article_processing_charge: No
article_type: review
arxiv: 1
author:
- first_name: Ferdinand
  full_name: Evers, Ferdinand
  last_name: Evers
- first_name: Amnon
  full_name: Aharony, Amnon
  last_name: Aharony
- first_name: Nir
  full_name: Bar-Gill, Nir
  last_name: Bar-Gill
- first_name: Ora
  full_name: Entin-Wohlman, Ora
  last_name: Entin-Wohlman
- first_name: Per
  full_name: Hedegård, Per
  last_name: Hedegård
- first_name: Oded
  full_name: Hod, Oded
  last_name: Hod
- first_name: Pavel
  full_name: Jelinek, Pavel
  last_name: Jelinek
- first_name: Grzegorz
  full_name: Kamieniarz, Grzegorz
  last_name: Kamieniarz
- first_name: Mikhail
  full_name: Lemeshko, Mikhail
  id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
  last_name: Lemeshko
  orcid: 0000-0002-6990-7802
- first_name: Karen
  full_name: Michaeli, Karen
  last_name: Michaeli
- first_name: Vladimiro
  full_name: Mujica, Vladimiro
  last_name: Mujica
- first_name: Ron
  full_name: Naaman, Ron
  last_name: Naaman
- first_name: Yossi
  full_name: Paltiel, Yossi
  last_name: Paltiel
- first_name: Sivan
  full_name: Refaely-Abramson, Sivan
  last_name: Refaely-Abramson
- first_name: Oren
  full_name: Tal, Oren
  last_name: Tal
- first_name: Jos
  full_name: Thijssen, Jos
  last_name: Thijssen
- first_name: Michael
  full_name: Thoss, Michael
  last_name: Thoss
- first_name: Jan M.
  full_name: Van Ruitenbeek, Jan M.
  last_name: Van Ruitenbeek
- first_name: Latha
  full_name: Venkataraman, Latha
  last_name: Venkataraman
- first_name: David H.
  full_name: Waldeck, David H.
  last_name: Waldeck
- first_name: Binghai
  full_name: Yan, Binghai
  last_name: Yan
- first_name: Leeor
  full_name: Kronik, Leeor
  last_name: Kronik
citation:
  ama: 'Evers F, Aharony A, Bar-Gill N, et al. Theory of chirality induced spin selectivity:
    Progress and challenges. <i>Advanced Materials</i>. 2022;34(13). doi:<a href="https://doi.org/10.1002/adma.202106629">10.1002/adma.202106629</a>'
  apa: 'Evers, F., Aharony, A., Bar-Gill, N., Entin-Wohlman, O., Hedegård, P., Hod,
    O., … Kronik, L. (2022). Theory of chirality induced spin selectivity: Progress
    and challenges. <i>Advanced Materials</i>. Wiley. <a href="https://doi.org/10.1002/adma.202106629">https://doi.org/10.1002/adma.202106629</a>'
  chicago: 'Evers, Ferdinand, Amnon Aharony, Nir Bar-Gill, Ora Entin-Wohlman, Per
    Hedegård, Oded Hod, Pavel Jelinek, et al. “Theory of Chirality Induced Spin Selectivity:
    Progress and Challenges.” <i>Advanced Materials</i>. Wiley, 2022. <a href="https://doi.org/10.1002/adma.202106629">https://doi.org/10.1002/adma.202106629</a>.'
  ieee: 'F. Evers <i>et al.</i>, “Theory of chirality induced spin selectivity: Progress
    and challenges,” <i>Advanced Materials</i>, vol. 34, no. 13. Wiley, 2022.'
  ista: 'Evers F, Aharony A, Bar-Gill N, Entin-Wohlman O, Hedegård P, Hod O, Jelinek
    P, Kamieniarz G, Lemeshko M, Michaeli K, Mujica V, Naaman R, Paltiel Y, Refaely-Abramson
    S, Tal O, Thijssen J, Thoss M, Van Ruitenbeek JM, Venkataraman L, Waldeck DH,
    Yan B, Kronik L. 2022. Theory of chirality induced spin selectivity: Progress
    and challenges. Advanced Materials. 34(13), 2106629.'
  mla: 'Evers, Ferdinand, et al. “Theory of Chirality Induced Spin Selectivity: Progress
    and Challenges.” <i>Advanced Materials</i>, vol. 34, no. 13, 2106629, Wiley, 2022,
    doi:<a href="https://doi.org/10.1002/adma.202106629">10.1002/adma.202106629</a>.'
  short: F. Evers, A. Aharony, N. Bar-Gill, O. Entin-Wohlman, P. Hedegård, O. Hod,
    P. Jelinek, G. Kamieniarz, M. Lemeshko, K. Michaeli, V. Mujica, R. Naaman, Y.
    Paltiel, S. Refaely-Abramson, O. Tal, J. Thijssen, M. Thoss, J.M. Van Ruitenbeek,
    L. Venkataraman, D.H. Waldeck, B. Yan, L. Kronik, Advanced Materials 34 (2022).
date_created: 2022-02-20T23:01:33Z
date_published: 2022-04-01T00:00:00Z
date_updated: 2023-08-02T14:30:22Z
day: '01'
department:
- _id: MiLe
doi: 10.1002/adma.202106629
external_id:
  arxiv:
  - '2108.09998'
  isi:
  - '000753795900001'
intvolume: '        34'
isi: 1
issue: '13'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://arxiv.org/abs/2108.09998
month: '04'
oa: 1
oa_version: Preprint
publication: Advanced Materials
publication_identifier:
  eissn:
  - '15214095'
  issn:
  - '09359648'
publication_status: published
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Theory of chirality induced spin selectivity: Progress and challenges'
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 34
year: '2022'
...
---
_id: '10845'
abstract:
- lang: eng
  text: We study an impurity with a resonance level whose position coincides with
    the Fermi energy of the surrounding Fermi gas. An impurity causes a rapid variation
    of the scattering phase shift for fermions at the Fermi surface, introducing a
    new characteristic length scale into the problem. We investigate manifestations
    of this length scale in the self-energy of the impurity and in the density of
    the bath. Our calculations reveal a model-independent deformation of the density
    of the Fermi gas, which is determined by the width of the resonance. To provide
    a broader picture, we investigate time evolution of the density in quench dynamics,
    and study the behavior of the system at finite temperatures. Finally, we briefly
    discuss implications of our findings for the Fermi-polaron problem.
acknowledgement: M.L. acknowledges support by the Austrian Science Fund (FWF), under
  Project No. P29902-N27, and by the European Research Council (ERC) starting Grant
  No. 801770 (ANGULON). A.G.V. acknowledges support by European Union’s Horizon 2020
  research and innovation programme under the Marie Skłodowska-Curie Grant Agreement
  No. 754411.
article_number: '013160'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Mikhail
  full_name: Maslov, Mikhail
  id: 2E65BB0E-F248-11E8-B48F-1D18A9856A87
  last_name: Maslov
  orcid: 0000-0003-4074-2570
- first_name: Mikhail
  full_name: Lemeshko, Mikhail
  id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
  last_name: Lemeshko
  orcid: 0000-0002-6990-7802
- first_name: Artem
  full_name: Volosniev, Artem
  id: 37D278BC-F248-11E8-B48F-1D18A9856A87
  last_name: Volosniev
  orcid: 0000-0003-0393-5525
citation:
  ama: Maslov M, Lemeshko M, Volosniev A. Impurity with a resonance in the vicinity
    of the Fermi energy. <i>Physical Review Research</i>. 2022;4. doi:<a href="https://doi.org/10.1103/PhysRevResearch.4.013160">10.1103/PhysRevResearch.4.013160</a>
  apa: Maslov, M., Lemeshko, M., &#38; Volosniev, A. (2022). Impurity with a resonance
    in the vicinity of the Fermi energy. <i>Physical Review Research</i>. American
    Physical Society. <a href="https://doi.org/10.1103/PhysRevResearch.4.013160">https://doi.org/10.1103/PhysRevResearch.4.013160</a>
  chicago: Maslov, Mikhail, Mikhail Lemeshko, and Artem Volosniev. “Impurity with
    a Resonance in the Vicinity of the Fermi Energy.” <i>Physical Review Research</i>.
    American Physical Society, 2022. <a href="https://doi.org/10.1103/PhysRevResearch.4.013160">https://doi.org/10.1103/PhysRevResearch.4.013160</a>.
  ieee: M. Maslov, M. Lemeshko, and A. Volosniev, “Impurity with a resonance in the
    vicinity of the Fermi energy,” <i>Physical Review Research</i>, vol. 4. American
    Physical Society, 2022.
  ista: Maslov M, Lemeshko M, Volosniev A. 2022. Impurity with a resonance in the
    vicinity of the Fermi energy. Physical Review Research. 4, 013160.
  mla: Maslov, Mikhail, et al. “Impurity with a Resonance in the Vicinity of the Fermi
    Energy.” <i>Physical Review Research</i>, vol. 4, 013160, American Physical Society,
    2022, doi:<a href="https://doi.org/10.1103/PhysRevResearch.4.013160">10.1103/PhysRevResearch.4.013160</a>.
  short: M. Maslov, M. Lemeshko, A. Volosniev, Physical Review Research 4 (2022).
date_created: 2022-03-13T23:01:46Z
date_published: 2022-03-01T00:00:00Z
date_updated: 2022-03-14T08:42:24Z
day: '01'
ddc:
- '530'
department:
- _id: MiLe
doi: 10.1103/PhysRevResearch.4.013160
ec_funded: 1
external_id:
  arxiv:
  - '2111.13570'
file:
- access_level: open_access
  checksum: 62f64b3421a969656ebf52467fa7b6e8
  content_type: application/pdf
  creator: dernst
  date_created: 2022-03-14T08:38:49Z
  date_updated: 2022-03-14T08:38:49Z
  file_id: '10848'
  file_name: 2022_PhysicalReviewResearch_Maslov.pdf
  file_size: 1258324
  relation: main_file
  success: 1
file_date_updated: 2022-03-14T08:38:49Z
has_accepted_license: '1'
intvolume: '         4'
language:
- iso: eng
month: '03'
oa: 1
oa_version: Published Version
project:
- _id: 26031614-B435-11E9-9278-68D0E5697425
  call_identifier: FWF
  grant_number: P29902
  name: Quantum rotations in the presence of a many-body environment
- _id: 2688CF98-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '801770'
  name: 'Angulon: physics and applications of a new quasiparticle'
- _id: 260C2330-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '754411'
  name: ISTplus - Postdoctoral Fellowships
publication: Physical Review Research
publication_identifier:
  issn:
  - 2643-1564
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Impurity with a resonance in the vicinity of the Fermi energy
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 4
year: '2022'
...
---
_id: '11552'
abstract:
- lang: eng
  text: Rotational dynamics of D2 molecules inside helium nanodroplets is induced
    by a moderately intense femtosecond pump pulse and measured as a function of time
    by recording the yield of HeD+ ions, created through strong-field dissociative
    ionization with a delayed femtosecond probe pulse. The yield oscillates with a
    period of 185 fs, reflecting field-free rotational wave packet dynamics, and the
    oscillation persists for more than 500 periods. Within the experimental uncertainty,
    the rotational constant BHe of the in-droplet D2 molecule, determined by Fourier
    analysis, is the same as Bgas for an isolated D2 molecule. Our observations show
    that the D2 molecules inside helium nanodroplets essentially rotate as free D2
    molecules.
article_number: '243201'
article_processing_charge: No
arxiv: 1
author:
- first_name: Junjie
  full_name: Qiang, Junjie
  last_name: Qiang
- first_name: Lianrong
  full_name: Zhou, Lianrong
  last_name: Zhou
- first_name: Peifen
  full_name: Lu, Peifen
  last_name: Lu
- first_name: Kang
  full_name: Lin, Kang
  last_name: Lin
- first_name: Yongzhe
  full_name: Ma, Yongzhe
  last_name: Ma
- first_name: Shengzhe
  full_name: Pan, Shengzhe
  last_name: Pan
- first_name: Chenxu
  full_name: Lu, Chenxu
  last_name: Lu
- first_name: Wenyu
  full_name: Jiang, Wenyu
  last_name: Jiang
- first_name: Fenghao
  full_name: Sun, Fenghao
  last_name: Sun
- first_name: Wenbin
  full_name: Zhang, Wenbin
  last_name: Zhang
- first_name: Hui
  full_name: Li, Hui
  last_name: Li
- first_name: Xiaochun
  full_name: Gong, Xiaochun
  last_name: Gong
- first_name: Ilya Sh
  full_name: Averbukh, Ilya Sh
  last_name: Averbukh
- first_name: Yehiam
  full_name: Prior, Yehiam
  last_name: Prior
- first_name: Constant A.
  full_name: Schouder, Constant A.
  last_name: Schouder
- first_name: Henrik
  full_name: Stapelfeldt, Henrik
  last_name: Stapelfeldt
- first_name: Igor
  full_name: Cherepanov, Igor
  id: 339C7E5A-F248-11E8-B48F-1D18A9856A87
  last_name: Cherepanov
- first_name: Mikhail
  full_name: Lemeshko, Mikhail
  id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
  last_name: Lemeshko
  orcid: 0000-0002-6990-7802
- first_name: Wolfgang
  full_name: Jäger, Wolfgang
  last_name: Jäger
- first_name: Jian
  full_name: Wu, Jian
  last_name: Wu
citation:
  ama: Qiang J, Zhou L, Lu P, et al. Femtosecond rotational dynamics of D2 molecules
    in superfluid helium nanodroplets. <i>Physical Review Letters</i>. 2022;128(24).
    doi:<a href="https://doi.org/10.1103/PhysRevLett.128.243201">10.1103/PhysRevLett.128.243201</a>
  apa: Qiang, J., Zhou, L., Lu, P., Lin, K., Ma, Y., Pan, S., … Wu, J. (2022). Femtosecond
    rotational dynamics of D2 molecules in superfluid helium nanodroplets. <i>Physical
    Review Letters</i>. American Physical Society. <a href="https://doi.org/10.1103/PhysRevLett.128.243201">https://doi.org/10.1103/PhysRevLett.128.243201</a>
  chicago: Qiang, Junjie, Lianrong Zhou, Peifen Lu, Kang Lin, Yongzhe Ma, Shengzhe
    Pan, Chenxu Lu, et al. “Femtosecond Rotational Dynamics of D2 Molecules in Superfluid
    Helium Nanodroplets.” <i>Physical Review Letters</i>. American Physical Society,
    2022. <a href="https://doi.org/10.1103/PhysRevLett.128.243201">https://doi.org/10.1103/PhysRevLett.128.243201</a>.
  ieee: J. Qiang <i>et al.</i>, “Femtosecond rotational dynamics of D2 molecules in
    superfluid helium nanodroplets,” <i>Physical Review Letters</i>, vol. 128, no.
    24. American Physical Society, 2022.
  ista: Qiang J, Zhou L, Lu P, Lin K, Ma Y, Pan S, Lu C, Jiang W, Sun F, Zhang W,
    Li H, Gong X, Averbukh IS, Prior Y, Schouder CA, Stapelfeldt H, Cherepanov I,
    Lemeshko M, Jäger W, Wu J. 2022. Femtosecond rotational dynamics of D2 molecules
    in superfluid helium nanodroplets. Physical Review Letters. 128(24), 243201.
  mla: Qiang, Junjie, et al. “Femtosecond Rotational Dynamics of D2 Molecules in Superfluid
    Helium Nanodroplets.” <i>Physical Review Letters</i>, vol. 128, no. 24, 243201,
    American Physical Society, 2022, doi:<a href="https://doi.org/10.1103/PhysRevLett.128.243201">10.1103/PhysRevLett.128.243201</a>.
  short: J. Qiang, L. Zhou, P. Lu, K. Lin, Y. Ma, S. Pan, C. Lu, W. Jiang, F. Sun,
    W. Zhang, H. Li, X. Gong, I.S. Averbukh, Y. Prior, C.A. Schouder, H. Stapelfeldt,
    I. Cherepanov, M. Lemeshko, W. Jäger, J. Wu, Physical Review Letters 128 (2022).
date_created: 2022-07-10T22:01:52Z
date_published: 2022-06-16T00:00:00Z
date_updated: 2023-08-03T11:54:14Z
day: '16'
department:
- _id: MiLe
doi: 10.1103/PhysRevLett.128.243201
ec_funded: 1
external_id:
  arxiv:
  - '2201.09281'
  isi:
  - '000820659700002'
intvolume: '       128'
isi: 1
issue: '24'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.48550/arXiv.2201.09281
month: '06'
oa: 1
oa_version: Submitted Version
project:
- _id: 2688CF98-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '801770'
  name: 'Angulon: physics and applications of a new quasiparticle'
- _id: 2564DBCA-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '665385'
  name: International IST Doctoral Program
publication: Physical Review Letters
publication_identifier:
  eissn:
  - '10797114'
  issn:
  - '00319007'
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Femtosecond rotational dynamics of D2 molecules in superfluid helium nanodroplets
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 128
year: '2022'
...
---
_id: '11590'
abstract:
- lang: eng
  text: 'We investigate the ground-state properties of weakly repulsive one-dimensional
    bosons in the presence of an attractive zero-range impurity potential. First,
    we derive mean-field solutions to the problem on a finite ring for the two asymptotic
    cases: (i) all bosons are bound to the impurity and (ii) all bosons are in a scattering
    state. Moreover, we derive the critical line that separates these regimes in the
    parameter space. In the thermodynamic limit, this critical line determines the
    maximum number of bosons that can be bound by the impurity potential, forming
    an artificial atom. Second, we validate the mean-field results using the flow
    equation approach and the multi-layer multi-configuration time-dependent Hartree
    method for atomic mixtures. While beyond-mean-field effects destroy long-range
    order in the Bose gas, the critical boson number is unaffected. Our findings are
    important for understanding such artificial atoms in low-density Bose gases with
    static and mobile impurities.'
acknowledgement: This work has received funding from the DFG Project No. 413495248
  [VO 2437/1-1] (FB, H-WH, AGV) and European Union's Horizon 2020 research and innovation
  programme under the Marie Skĺodowska-Curie Grant Agreement No. 754411 (AGV). ML
  acknowledges support by the European Research Council (ERC) Starting Grant No. 801770
  (ANGULON). SIM acknowledges support from the NSF through a grant for ITAMP at Harvard
  University.
article_number: '063036'
article_processing_charge: No
article_type: original
author:
- first_name: Fabian
  full_name: Brauneis, Fabian
  last_name: Brauneis
- first_name: Timothy G.
  full_name: Backert, Timothy G.
  last_name: Backert
- first_name: Simeon I.
  full_name: Mistakidis, Simeon I.
  last_name: Mistakidis
- first_name: Mikhail
  full_name: Lemeshko, Mikhail
  id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
  last_name: Lemeshko
  orcid: 0000-0002-6990-7802
- first_name: Hans Werner
  full_name: Hammer, Hans Werner
  last_name: Hammer
- first_name: Artem
  full_name: Volosniev, Artem
  id: 37D278BC-F248-11E8-B48F-1D18A9856A87
  last_name: Volosniev
  orcid: 0000-0003-0393-5525
citation:
  ama: Brauneis F, Backert TG, Mistakidis SI, Lemeshko M, Hammer HW, Volosniev A.
    Artificial atoms from cold bosons in one dimension. <i>New Journal of Physics</i>.
    2022;24(6). doi:<a href="https://doi.org/10.1088/1367-2630/ac78d8">10.1088/1367-2630/ac78d8</a>
  apa: Brauneis, F., Backert, T. G., Mistakidis, S. I., Lemeshko, M., Hammer, H. W.,
    &#38; Volosniev, A. (2022). Artificial atoms from cold bosons in one dimension.
    <i>New Journal of Physics</i>. IOP Publishing. <a href="https://doi.org/10.1088/1367-2630/ac78d8">https://doi.org/10.1088/1367-2630/ac78d8</a>
  chicago: Brauneis, Fabian, Timothy G. Backert, Simeon I. Mistakidis, Mikhail Lemeshko,
    Hans Werner Hammer, and Artem Volosniev. “Artificial Atoms from Cold Bosons in
    One Dimension.” <i>New Journal of Physics</i>. IOP Publishing, 2022. <a href="https://doi.org/10.1088/1367-2630/ac78d8">https://doi.org/10.1088/1367-2630/ac78d8</a>.
  ieee: F. Brauneis, T. G. Backert, S. I. Mistakidis, M. Lemeshko, H. W. Hammer, and
    A. Volosniev, “Artificial atoms from cold bosons in one dimension,” <i>New Journal
    of Physics</i>, vol. 24, no. 6. IOP Publishing, 2022.
  ista: Brauneis F, Backert TG, Mistakidis SI, Lemeshko M, Hammer HW, Volosniev A.
    2022. Artificial atoms from cold bosons in one dimension. New Journal of Physics.
    24(6), 063036.
  mla: Brauneis, Fabian, et al. “Artificial Atoms from Cold Bosons in One Dimension.”
    <i>New Journal of Physics</i>, vol. 24, no. 6, 063036, IOP Publishing, 2022, doi:<a
    href="https://doi.org/10.1088/1367-2630/ac78d8">10.1088/1367-2630/ac78d8</a>.
  short: F. Brauneis, T.G. Backert, S.I. Mistakidis, M. Lemeshko, H.W. Hammer, A.
    Volosniev, New Journal of Physics 24 (2022).
date_created: 2022-07-17T22:01:55Z
date_published: 2022-06-01T00:00:00Z
date_updated: 2023-08-03T11:57:41Z
day: '01'
ddc:
- '530'
department:
- _id: MiLe
doi: 10.1088/1367-2630/ac78d8
ec_funded: 1
external_id:
  isi:
  - '000818530000001'
file:
- access_level: open_access
  checksum: dc67b60f2e50e9ef2bd820ca0d7333d2
  content_type: application/pdf
  creator: dernst
  date_created: 2022-07-18T06:33:13Z
  date_updated: 2022-07-18T06:33:13Z
  file_id: '11594'
  file_name: 2022_NewJournalPhysics_Brauneis.pdf
  file_size: 3415721
  relation: main_file
  success: 1
file_date_updated: 2022-07-18T06:33:13Z
has_accepted_license: '1'
intvolume: '        24'
isi: 1
issue: '6'
language:
- iso: eng
month: '06'
oa: 1
oa_version: Published Version
project:
- _id: 260C2330-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '754411'
  name: ISTplus - Postdoctoral Fellowships
- _id: 2688CF98-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '801770'
  name: 'Angulon: physics and applications of a new quasiparticle'
publication: New Journal of Physics
publication_identifier:
  issn:
  - 1367-2630
publication_status: published
publisher: IOP Publishing
quality_controlled: '1'
scopus_import: '1'
status: public
title: Artificial atoms from cold bosons in one dimension
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 24
year: '2022'
...
---
_id: '11592'
abstract:
- lang: eng
  text: 'We compare recent experimental results [Science 375, 528 (2022)] of the superfluid
    unitary Fermi gas near the critical temperature with a thermodynamic model based
    on the elementary excitations of the system. We find good agreement between experimental
    data and our theory for several quantities such as first sound, second sound,
    and superfluid fraction. We also show that mode mixing between first and second
    sound occurs. Finally, we characterize the response amplitude to a density perturbation:
    Close to the critical temperature both first and second sound can be excited through
    a density perturbation, whereas at lower temperatures only the first sound mode
    exhibits a significant response.'
acknowledgement: The authors gratefully acknowledge stimulating discussions with T.
  Enss, and thank an anonymous referee for suggestions and remarks that allowed us
  to improve the original manuscript. This work is supported by the Deutsche Forschungsgemeinschaft
  (DFG, German Research Foundation) under Germany’s Excellence Strategy EXC2181/1-390900948
  (the Heidelberg STRUCTURES Excellence Cluster).
article_number: '063329'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Giacomo
  full_name: Bighin, Giacomo
  id: 4CA96FD4-F248-11E8-B48F-1D18A9856A87
  last_name: Bighin
  orcid: 0000-0001-8823-9777
- first_name: Alberto
  full_name: Cappellaro, Alberto
  id: 9d13b3cb-30a2-11eb-80dc-f772505e8660
  last_name: Cappellaro
  orcid: 0000-0001-6110-2359
- first_name: L.
  full_name: Salasnich, L.
  last_name: Salasnich
citation:
  ama: 'Bighin G, Cappellaro A, Salasnich L. Unitary Fermi superfluid near the critical
    temperature: Thermodynamics and sound modes from elementary excitations. <i>Physical
    Review A</i>. 2022;105(6). doi:<a href="https://doi.org/10.1103/PhysRevA.105.063329">10.1103/PhysRevA.105.063329</a>'
  apa: 'Bighin, G., Cappellaro, A., &#38; Salasnich, L. (2022). Unitary Fermi superfluid
    near the critical temperature: Thermodynamics and sound modes from elementary
    excitations. <i>Physical Review A</i>. American Physical Society. <a href="https://doi.org/10.1103/PhysRevA.105.063329">https://doi.org/10.1103/PhysRevA.105.063329</a>'
  chicago: 'Bighin, Giacomo, Alberto Cappellaro, and L. Salasnich. “Unitary Fermi
    Superfluid near the Critical Temperature: Thermodynamics and Sound Modes from
    Elementary Excitations.” <i>Physical Review A</i>. American Physical Society,
    2022. <a href="https://doi.org/10.1103/PhysRevA.105.063329">https://doi.org/10.1103/PhysRevA.105.063329</a>.'
  ieee: 'G. Bighin, A. Cappellaro, and L. Salasnich, “Unitary Fermi superfluid near
    the critical temperature: Thermodynamics and sound modes from elementary excitations,”
    <i>Physical Review A</i>, vol. 105, no. 6. American Physical Society, 2022.'
  ista: 'Bighin G, Cappellaro A, Salasnich L. 2022. Unitary Fermi superfluid near
    the critical temperature: Thermodynamics and sound modes from elementary excitations.
    Physical Review A. 105(6), 063329.'
  mla: 'Bighin, Giacomo, et al. “Unitary Fermi Superfluid near the Critical Temperature:
    Thermodynamics and Sound Modes from Elementary Excitations.” <i>Physical Review
    A</i>, vol. 105, no. 6, 063329, American Physical Society, 2022, doi:<a href="https://doi.org/10.1103/PhysRevA.105.063329">10.1103/PhysRevA.105.063329</a>.'
  short: G. Bighin, A. Cappellaro, L. Salasnich, Physical Review A 105 (2022).
date_created: 2022-07-17T22:01:55Z
date_published: 2022-06-30T00:00:00Z
date_updated: 2023-08-03T12:00:11Z
day: '30'
department:
- _id: MiLe
doi: 10.1103/PhysRevA.105.063329
external_id:
  arxiv:
  - '2206.03924'
  isi:
  - '000829758500010'
intvolume: '       105'
isi: 1
issue: '6'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: ' https://doi.org/10.48550/arXiv.2206.03924'
month: '06'
oa: 1
oa_version: Preprint
publication: Physical Review A
publication_identifier:
  eissn:
  - 2469-9934
  issn:
  - 2469-9926
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Unitary Fermi superfluid near the critical temperature: Thermodynamics and
  sound modes from elementary excitations'
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 105
year: '2022'
...
---
_id: '11997'
abstract:
- lang: eng
  text: "We study the fate of an impurity in an ultracold heteronuclear Bose mixture,
    focusing on the experimentally relevant case of a ⁴¹K - ⁸⁷Rb mixture, with the
    impurity in a ⁴¹K hyperfine state. Our paper provides a comprehensive description
    of an impurity in a BEC mixture with contact interactions across its phase diagram.
    We present results for the miscible and immiscible regimes, as well as for the
    impurity in a self-bound quantum droplet. Here, varying the interactions, we find
    exotic states where the impurity localizes either at the center or\r\nat the surface
    of the droplet. "
acknowledgement: We thank A. Simoni for providing the calculations of the intercomponent
  scattering lengths. We gratefully acknowledge stimulating discussions with L. A.
  Peña Ardila, R. Schmidt, H. Silva, V. Zampronio, and M. Prevedelli for careful reading.
  G.B. acknowledges support from the Austrian Science Fund (FWF) under Project No.
  M2641-N27. T.M. acknowledges CNPq for support through Bolsa de produtividade em
  Pesquisa No. 311079/2015-6. This work is supported by the Deutsche Forschungsgemeinschaft
  (DFG, German Research Foundation) under Germany's Excellence Strategy No. EXC2181/1-390900948
  (the Heidelberg STRUCTURES Excellence Cluster). This work was supported by the Serrapilheira
  Institute (Grant No. Serra-1812-27802). We thank the High-Performance Computing
  Center (NPAD) at UFRN for providing computational resources.
article_number: '023301'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Giacomo
  full_name: Bighin, Giacomo
  id: 4CA96FD4-F248-11E8-B48F-1D18A9856A87
  last_name: Bighin
  orcid: 0000-0001-8823-9777
- first_name: A.
  full_name: Burchianti, A.
  last_name: Burchianti
- first_name: F.
  full_name: Minardi, F.
  last_name: Minardi
- first_name: T.
  full_name: Macrì, T.
  last_name: Macrì
citation:
  ama: Bighin G, Burchianti A, Minardi F, Macrì T. Impurity in a heteronuclear two-component
    Bose mixture. <i>Physical Review A</i>. 2022;106(2). doi:<a href="https://doi.org/10.1103/PhysRevA.106.023301">10.1103/PhysRevA.106.023301</a>
  apa: Bighin, G., Burchianti, A., Minardi, F., &#38; Macrì, T. (2022). Impurity in
    a heteronuclear two-component Bose mixture. <i>Physical Review A</i>. American
    Physical Society. <a href="https://doi.org/10.1103/PhysRevA.106.023301">https://doi.org/10.1103/PhysRevA.106.023301</a>
  chicago: Bighin, Giacomo, A. Burchianti, F. Minardi, and T. Macrì. “Impurity in
    a Heteronuclear Two-Component Bose Mixture.” <i>Physical Review A</i>. American
    Physical Society, 2022. <a href="https://doi.org/10.1103/PhysRevA.106.023301">https://doi.org/10.1103/PhysRevA.106.023301</a>.
  ieee: G. Bighin, A. Burchianti, F. Minardi, and T. Macrì, “Impurity in a heteronuclear
    two-component Bose mixture,” <i>Physical Review A</i>, vol. 106, no. 2. American
    Physical Society, 2022.
  ista: Bighin G, Burchianti A, Minardi F, Macrì T. 2022. Impurity in a heteronuclear
    two-component Bose mixture. Physical Review A. 106(2), 023301.
  mla: Bighin, Giacomo, et al. “Impurity in a Heteronuclear Two-Component Bose Mixture.”
    <i>Physical Review A</i>, vol. 106, no. 2, 023301, American Physical Society,
    2022, doi:<a href="https://doi.org/10.1103/PhysRevA.106.023301">10.1103/PhysRevA.106.023301</a>.
  short: G. Bighin, A. Burchianti, F. Minardi, T. Macrì, Physical Review A 106 (2022).
date_created: 2022-08-28T22:02:00Z
date_published: 2022-08-04T00:00:00Z
date_updated: 2024-08-07T07:16:52Z
day: '04'
department:
- _id: MiLe
doi: 10.1103/PhysRevA.106.023301
external_id:
  arxiv:
  - '2109.07451'
  isi:
  - '000837953600006'
intvolume: '       106'
isi: 1
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.48550/arXiv.2109.07451
month: '08'
oa: 1
oa_version: Preprint
project:
- _id: 26986C82-B435-11E9-9278-68D0E5697425
  call_identifier: FWF
  grant_number: M02641
  name: A path-integral approach to composite impurities
publication: Physical Review A
publication_identifier:
  eissn:
  - 2469-9934
  issn:
  - 2469-9926
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Impurity in a heteronuclear two-component Bose mixture
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 106
year: '2022'
...
---
_id: '11998'
abstract:
- lang: eng
  text: Recently it became possible to study highly excited rotational states of molecules
    in superfluid helium through nonadiabatic alignment experiments (Cherepanov et
    al 2021 Phys. Rev. A 104 L061303). This calls for theoretical approaches that
    go beyond explaining renormalized values of molecular spectroscopic constants,
    which suffices when only the lowest few rotational states are involved. As the
    first step in this direction, here we present a basic quantum mechanical model
    describing highly excited rotational states of molecules in superfluid helium
    nanodroplets. We show that a linear molecule immersed in a superfluid can be seen
    as an effective symmetric top, similar to the rotational structure of radicals,
    such as OH or NO, but with the angular momentum of the superfluid playing the
    role of the electronic angular momentum in free molecules. The simple theory sheds
    light onto what happens when the rotational angular momentum of the molecule increases
    beyond the lowest excited states accessible by infrared spectroscopy. In addition,
    the model allows to estimate the effective rotational and centrifugal distortion
    constants for a broad range of species and to explain the crossover between light
    and heavy molecules in superfluid 4He in terms of the many-body wavefunction structure.
    Some of the above mentioned insights can be acquired by analyzing a simple 2 ×
    2 matrix.
acknowledgement: IC acknowledges the support by the European Union's Horizon 2020
  research and innovation programme under the Marie Skłodowska-Curie Grant Agreement
  No. 665385. GB acknowledges support from the Austrian Science Fund (FWF), under
  Project No. M2461-N27 and from the Deutsche Forschungsgemeinschaft (DFG, German
  Research Foundation) under Germany's Excellence Strategy EXC2181/1-390900948 (the
  Heidelberg STRUCTURES Excellence Cluster). ML acknowledges support by the Austrian
  Science Fund (FWF), under Project No. P29902-N27, and by the European Research Council
  (ERC) starting Grant No. 801770 (ANGULON). HS acknowledges support from the Independent
  Research Fund Denmark (Project No. 8021-00232B) and from the Villum Fonden through
  a Villum Investigator Grant No. 25886.
article_number: '075004'
article_processing_charge: Yes
article_type: original
author:
- first_name: Igor
  full_name: Cherepanov, Igor
  id: 339C7E5A-F248-11E8-B48F-1D18A9856A87
  last_name: Cherepanov
- first_name: Giacomo
  full_name: Bighin, Giacomo
  id: 4CA96FD4-F248-11E8-B48F-1D18A9856A87
  last_name: Bighin
  orcid: 0000-0001-8823-9777
- first_name: Constant A.
  full_name: Schouder, Constant A.
  last_name: Schouder
- first_name: Adam S.
  full_name: Chatterley, Adam S.
  last_name: Chatterley
- first_name: Henrik
  full_name: Stapelfeldt, Henrik
  last_name: Stapelfeldt
- first_name: Mikhail
  full_name: Lemeshko, Mikhail
  id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
  last_name: Lemeshko
  orcid: 0000-0002-6990-7802
citation:
  ama: Cherepanov I, Bighin G, Schouder CA, Chatterley AS, Stapelfeldt H, Lemeshko
    M. A simple model for high rotational excitations of molecules in a superfluid.
    <i>New Journal of Physics</i>. 2022;24(7). doi:<a href="https://doi.org/10.1088/1367-2630/ac8113">10.1088/1367-2630/ac8113</a>
  apa: Cherepanov, I., Bighin, G., Schouder, C. A., Chatterley, A. S., Stapelfeldt,
    H., &#38; Lemeshko, M. (2022). A simple model for high rotational excitations
    of molecules in a superfluid. <i>New Journal of Physics</i>. IOP. <a href="https://doi.org/10.1088/1367-2630/ac8113">https://doi.org/10.1088/1367-2630/ac8113</a>
  chicago: Cherepanov, Igor, Giacomo Bighin, Constant A. Schouder, Adam S. Chatterley,
    Henrik Stapelfeldt, and Mikhail Lemeshko. “A Simple Model for High Rotational
    Excitations of Molecules in a Superfluid.” <i>New Journal of Physics</i>. IOP,
    2022. <a href="https://doi.org/10.1088/1367-2630/ac8113">https://doi.org/10.1088/1367-2630/ac8113</a>.
  ieee: I. Cherepanov, G. Bighin, C. A. Schouder, A. S. Chatterley, H. Stapelfeldt,
    and M. Lemeshko, “A simple model for high rotational excitations of molecules
    in a superfluid,” <i>New Journal of Physics</i>, vol. 24, no. 7. IOP, 2022.
  ista: Cherepanov I, Bighin G, Schouder CA, Chatterley AS, Stapelfeldt H, Lemeshko
    M. 2022. A simple model for high rotational excitations of molecules in a superfluid.
    New Journal of Physics. 24(7), 075004.
  mla: Cherepanov, Igor, et al. “A Simple Model for High Rotational Excitations of
    Molecules in a Superfluid.” <i>New Journal of Physics</i>, vol. 24, no. 7, 075004,
    IOP, 2022, doi:<a href="https://doi.org/10.1088/1367-2630/ac8113">10.1088/1367-2630/ac8113</a>.
  short: I. Cherepanov, G. Bighin, C.A. Schouder, A.S. Chatterley, H. Stapelfeldt,
    M. Lemeshko, New Journal of Physics 24 (2022).
date_created: 2022-08-28T22:02:01Z
date_published: 2022-08-11T00:00:00Z
date_updated: 2024-08-07T07:16:52Z
day: '11'
ddc:
- '530'
department:
- _id: MiLe
doi: 10.1088/1367-2630/ac8113
ec_funded: 1
external_id:
  isi:
  - '000839216900001'
file:
- access_level: open_access
  checksum: 10116a08d3489befc13dba2cc44490f1
  content_type: application/pdf
  creator: alisjak
  date_created: 2022-08-29T09:57:40Z
  date_updated: 2022-08-29T09:57:40Z
  file_id: '12005'
  file_name: 2022_NewJournalofPhysics_Cherepanov.pdf
  file_size: 1912882
  relation: main_file
  success: 1
file_date_updated: 2022-08-29T09:57:40Z
has_accepted_license: '1'
intvolume: '        24'
isi: 1
issue: '7'
language:
- iso: eng
month: '08'
oa: 1
oa_version: Published Version
project:
- _id: 2564DBCA-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '665385'
  name: International IST Doctoral Program
- _id: 2688CF98-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '801770'
  name: 'Angulon: physics and applications of a new quasiparticle'
- _id: 26986C82-B435-11E9-9278-68D0E5697425
  call_identifier: FWF
  grant_number: M02641
  name: A path-integral approach to composite impurities
publication: New Journal of Physics
publication_identifier:
  issn:
  - 1367-2630
publication_status: published
publisher: IOP
quality_controlled: '1'
scopus_import: '1'
status: public
title: A simple model for high rotational excitations of molecules in a superfluid
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 24
year: '2022'
...
---
_id: '12139'
abstract:
- lang: eng
  text: We demonstrate the formation of robust zero-energy modes close to magnetic
    impurities in the iron-based superconductor FeSe1-z Tez. We find that the Zeeman
    field generated by the impurity favors a spin-triplet interorbital pairing as
    opposed to the spin-singlet intraorbital pairing prevalent in the bulk. The preferred
    spin-triplet pairing preserves time-reversal symmetry and is topological, as robust,
    topologically protected zero modes emerge at the boundary between regions with
    different pairing states. Moreover, the zero modes form Kramers doublets that
    are insensitive to the direction of the spin polarization or to the separation
    between impurities. We argue that our theoretical results are consistent with
    recent experimental measurements on FeSe1-z Tez.
acknowledgement: "We thank Armin Rahmani, Andrey V. Chubukov, Jay D. Sau and Ruixing
  Zhang for fruitful discussions. AK and PG are supported by NSF-DMR2037996. PG also
  acknowledges support from NSF-DMR1824265. RMF was supported by the U. S. Department
  of Energy, Office\r\nof Science, Basic Energy Sciences, Materials Sciences and Engineering
  Division, under Award No. DE-SC0020045. Part of this work was performed at the Aspen
  Center for Physics, which is supported by National Science Foundation grant PHY-1607611. "
article_number: L201107
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Areg
  full_name: Ghazaryan, Areg
  id: 4AF46FD6-F248-11E8-B48F-1D18A9856A87
  last_name: Ghazaryan
  orcid: 0000-0001-9666-3543
- first_name: Ammar
  full_name: Kirmani, Ammar
  last_name: Kirmani
- first_name: Rafael M.
  full_name: Fernandes, Rafael M.
  last_name: Fernandes
- first_name: Pouyan
  full_name: Ghaemi, Pouyan
  last_name: Ghaemi
citation:
  ama: Ghazaryan A, Kirmani A, Fernandes RM, Ghaemi P. Anomalous Shiba states in topological
    iron-based superconductors. <i>Physical Review B</i>. 2022;106(20). doi:<a href="https://doi.org/10.1103/physrevb.106.l201107">10.1103/physrevb.106.l201107</a>
  apa: Ghazaryan, A., Kirmani, A., Fernandes, R. M., &#38; Ghaemi, P. (2022). Anomalous
    Shiba states in topological iron-based superconductors. <i>Physical Review B</i>.
    American Physical Society. <a href="https://doi.org/10.1103/physrevb.106.l201107">https://doi.org/10.1103/physrevb.106.l201107</a>
  chicago: Ghazaryan, Areg, Ammar Kirmani, Rafael M. Fernandes, and Pouyan Ghaemi.
    “Anomalous Shiba States in Topological Iron-Based Superconductors.” <i>Physical
    Review B</i>. American Physical Society, 2022. <a href="https://doi.org/10.1103/physrevb.106.l201107">https://doi.org/10.1103/physrevb.106.l201107</a>.
  ieee: A. Ghazaryan, A. Kirmani, R. M. Fernandes, and P. Ghaemi, “Anomalous Shiba
    states in topological iron-based superconductors,” <i>Physical Review B</i>, vol.
    106, no. 20. American Physical Society, 2022.
  ista: Ghazaryan A, Kirmani A, Fernandes RM, Ghaemi P. 2022. Anomalous Shiba states
    in topological iron-based superconductors. Physical Review B. 106(20), L201107.
  mla: Ghazaryan, Areg, et al. “Anomalous Shiba States in Topological Iron-Based Superconductors.”
    <i>Physical Review B</i>, vol. 106, no. 20, L201107, American Physical Society,
    2022, doi:<a href="https://doi.org/10.1103/physrevb.106.l201107">10.1103/physrevb.106.l201107</a>.
  short: A. Ghazaryan, A. Kirmani, R.M. Fernandes, P. Ghaemi, Physical Review B 106
    (2022).
date_created: 2023-01-12T12:04:43Z
date_published: 2022-11-15T00:00:00Z
date_updated: 2023-08-04T08:55:31Z
day: '15'
department:
- _id: MiLe
doi: 10.1103/physrevb.106.l201107
external_id:
  arxiv:
  - '2207.12425'
  isi:
  - '000893171800001'
intvolume: '       106'
isi: 1
issue: '20'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: ' https://doi.org/10.48550/arXiv.2207.12425'
month: '11'
oa: 1
oa_version: Preprint
publication: Physical Review B
publication_identifier:
  eissn:
  - 2469-9969
  issn:
  - 2469-9950
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Anomalous Shiba states in topological iron-based superconductors
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 106
year: '2022'
...
---
_id: '12150'
abstract:
- lang: eng
  text: Methods inspired from machine learning have recently attracted great interest
    in the computational study of quantum many-particle systems. So far, however,
    it has proven challenging to deal with microscopic models in which the total number
    of particles is not conserved. To address this issue, we propose a variant of
    neural network states, which we term neural coherent states. Taking the Fröhlich
    impurity model as a case study, we show that neural coherent states can learn
    the ground state of nonadditive systems very well. In particular, we recover exact
    diagonalization in all regimes tested and observe substantial improvement over
    the standard coherent state estimates in the most challenging intermediate-coupling
    regime. Our approach is generic and does not assume specific details of the system,
    suggesting wide applications.
acknowledgement: 'We acknowledge fruitful discussions with G. Bighin, G. Fabiani,
  A. Ghazaryan, C. Lampert, and A. Volosniev at various stages of this work. W.R.
  acknowledges support through a DOC Fellowship of the Austrian Academy of Sciences
  and has received funding from the EU Horizon 2020 programme under the Marie Skłodowska-Curie
  Grant Agreement No. 665385. M.L. and J.H.M. acknowledge support by the European
  Research Council (ERC) Starting Grant No. 801770 (ANGULON) and Synergy Grant No.
  856538 (3D-MAGiC), respectively. This work is part of the Shell-NWO/FOMinitiative
  “Computational sciences for energy research” of Shell and Chemical Sciences, Earth
  and Life Sciences, Physical Sciences, FOM and STW. '
article_number: '155127'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Wojciech
  full_name: Rzadkowski, Wojciech
  id: 48C55298-F248-11E8-B48F-1D18A9856A87
  last_name: Rzadkowski
  orcid: 0000-0002-1106-4419
- first_name: Mikhail
  full_name: Lemeshko, Mikhail
  id: 37CB05FA-F248-11E8-B48F-1D18A9856A87
  last_name: Lemeshko
  orcid: 0000-0002-6990-7802
- first_name: Johan H.
  full_name: Mentink, Johan H.
  last_name: Mentink
citation:
  ama: Rzadkowski W, Lemeshko M, Mentink JH. Artificial neural network states for
    nonadditive systems. <i>Physical Review B</i>. 2022;106(15). doi:<a href="https://doi.org/10.1103/physrevb.106.155127">10.1103/physrevb.106.155127</a>
  apa: Rzadkowski, W., Lemeshko, M., &#38; Mentink, J. H. (2022). Artificial neural
    network states for nonadditive systems. <i>Physical Review B</i>. American Physical
    Society. <a href="https://doi.org/10.1103/physrevb.106.155127">https://doi.org/10.1103/physrevb.106.155127</a>
  chicago: Rzadkowski, Wojciech, Mikhail Lemeshko, and Johan H. Mentink. “Artificial
    Neural Network States for Nonadditive Systems.” <i>Physical Review B</i>. American
    Physical Society, 2022. <a href="https://doi.org/10.1103/physrevb.106.155127">https://doi.org/10.1103/physrevb.106.155127</a>.
  ieee: W. Rzadkowski, M. Lemeshko, and J. H. Mentink, “Artificial neural network
    states for nonadditive systems,” <i>Physical Review B</i>, vol. 106, no. 15. American
    Physical Society, 2022.
  ista: Rzadkowski W, Lemeshko M, Mentink JH. 2022. Artificial neural network states
    for nonadditive systems. Physical Review B. 106(15), 155127.
  mla: Rzadkowski, Wojciech, et al. “Artificial Neural Network States for Nonadditive
    Systems.” <i>Physical Review B</i>, vol. 106, no. 15, 155127, American Physical
    Society, 2022, doi:<a href="https://doi.org/10.1103/physrevb.106.155127">10.1103/physrevb.106.155127</a>.
  short: W. Rzadkowski, M. Lemeshko, J.H. Mentink, Physical Review B 106 (2022).
date_created: 2023-01-12T12:07:49Z
date_published: 2022-10-15T00:00:00Z
date_updated: 2023-08-04T09:01:48Z
day: '15'
department:
- _id: MiLe
doi: 10.1103/physrevb.106.155127
ec_funded: 1
external_id:
  arxiv:
  - '2105.15193'
  isi:
  - '000875189100005'
intvolume: '       106'
isi: 1
issue: '15'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: ' https://doi.org/10.48550/arXiv.2105.15193'
month: '10'
oa: 1
oa_version: Preprint
project:
- _id: 05A235A0-7A3F-11EA-A408-12923DDC885E
  grant_number: '25681'
  name: Analytic and machine learning approaches to composite quantum impurities
- _id: 2564DBCA-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '665385'
  name: International IST Doctoral Program
- _id: 2688CF98-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '801770'
  name: 'Angulon: physics and applications of a new quasiparticle'
publication: Physical Review B
publication_identifier:
  eissn:
  - 2469-9969
  issn:
  - 2469-9950
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Artificial neural network states for nonadditive systems
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 106
year: '2022'
...
---
_id: '12154'
abstract:
- lang: eng
  text: We review our theoretical results of the sound propagation in two-dimensional
    (2D) systems of ultracold fermionic and bosonic atoms. In the superfluid phase,
    characterized by the spontaneous symmetry breaking of the U(1) symmetry, there
    is the coexistence of first and second sound. In the case of weakly-interacting
    repulsive bosons, we model the recent measurements of the sound velocities of
    39K atoms in 2D obtained in the weakly-interacting regime and around the Berezinskii–Kosterlitz–Thouless
    (BKT) superfluid-to-normal transition temperature. In particular, we perform a
    quite accurate computation of the superfluid density and show that it is reasonably
    consistent with the experimental results. For superfluid attractive fermions,
    we calculate the first and second sound velocities across the whole BCS-BEC crossover.
    In the low-temperature regime, we reproduce the recent measurements of first-sound
    speed with 6Li atoms. We also predict that there is mixing between sound modes
    only in the finite-temperature BEC regime.
acknowledgement: "This research is partially supported by University of Padova, BIRD
  grant “Ultracold atoms\r\nin curved geometries”. KF is supported by Fondazione CARIPARO
  with a PhD fellowship. AT is\r\npartially supported by French National Research
  Agency ANR Grant Droplets N. ANR-19-CE30-0003-02. LS thanks Herwig Ott and Sandro
  Wimberger for their kind invitation to the\r\nInternational Workshop “Quantum Transport
  with ultracold atoms” (2022)."
article_number: '2182'
article_processing_charge: Yes
article_type: original
author:
- first_name: Luca
  full_name: Salasnich, Luca
  last_name: Salasnich
- first_name: Alberto
  full_name: Cappellaro, Alberto
  id: 9d13b3cb-30a2-11eb-80dc-f772505e8660
  last_name: Cappellaro
  orcid: 0000-0001-6110-2359
- first_name: Koichiro
  full_name: Furutani, Koichiro
  last_name: Furutani
- first_name: Andrea
  full_name: Tononi, Andrea
  last_name: Tononi
- first_name: Giacomo
  full_name: Bighin, Giacomo
  id: 4CA96FD4-F248-11E8-B48F-1D18A9856A87
  last_name: Bighin
  orcid: 0000-0001-8823-9777
citation:
  ama: Salasnich L, Cappellaro A, Furutani K, Tononi A, Bighin G. First and second
    sound in two-dimensional bosonic and fermionic superfluids. <i>Symmetry</i>. 2022;14(10).
    doi:<a href="https://doi.org/10.3390/sym14102182">10.3390/sym14102182</a>
  apa: Salasnich, L., Cappellaro, A., Furutani, K., Tononi, A., &#38; Bighin, G. (2022).
    First and second sound in two-dimensional bosonic and fermionic superfluids. <i>Symmetry</i>.
    MDPI. <a href="https://doi.org/10.3390/sym14102182">https://doi.org/10.3390/sym14102182</a>
  chicago: Salasnich, Luca, Alberto Cappellaro, Koichiro Furutani, Andrea Tononi,
    and Giacomo Bighin. “First and Second Sound in Two-Dimensional Bosonic and Fermionic
    Superfluids.” <i>Symmetry</i>. MDPI, 2022. <a href="https://doi.org/10.3390/sym14102182">https://doi.org/10.3390/sym14102182</a>.
  ieee: L. Salasnich, A. Cappellaro, K. Furutani, A. Tononi, and G. Bighin, “First
    and second sound in two-dimensional bosonic and fermionic superfluids,” <i>Symmetry</i>,
    vol. 14, no. 10. MDPI, 2022.
  ista: Salasnich L, Cappellaro A, Furutani K, Tononi A, Bighin G. 2022. First and
    second sound in two-dimensional bosonic and fermionic superfluids. Symmetry. 14(10),
    2182.
  mla: Salasnich, Luca, et al. “First and Second Sound in Two-Dimensional Bosonic
    and Fermionic Superfluids.” <i>Symmetry</i>, vol. 14, no. 10, 2182, MDPI, 2022,
    doi:<a href="https://doi.org/10.3390/sym14102182">10.3390/sym14102182</a>.
  short: L. Salasnich, A. Cappellaro, K. Furutani, A. Tononi, G. Bighin, Symmetry
    14 (2022).
date_created: 2023-01-12T12:08:31Z
date_published: 2022-10-17T00:00:00Z
date_updated: 2023-08-09T10:13:17Z
day: '17'
ddc:
- '530'
department:
- _id: MiLe
doi: 10.3390/sym14102182
external_id:
  isi:
  - '000875039200001'
file:
- access_level: open_access
  checksum: 9b6bd0e484834dd76d7b26e3c5fba8bd
  content_type: application/pdf
  creator: dernst
  date_created: 2023-01-24T10:56:12Z
  date_updated: 2023-01-24T10:56:12Z
  file_id: '12361'
  file_name: 2022_Symmetry_Salsnich.pdf
  file_size: 843723
  relation: main_file
  success: 1
file_date_updated: 2023-01-24T10:56:12Z
has_accepted_license: '1'
intvolume: '        14'
isi: 1
issue: '10'
keyword:
- Physics and Astronomy (miscellaneous)
- General Mathematics
- Chemistry (miscellaneous)
- Computer Science (miscellaneous)
language:
- iso: eng
month: '10'
oa: 1
oa_version: Published Version
publication: Symmetry
publication_identifier:
  issn:
  - 2073-8994
publication_status: published
publisher: MDPI
quality_controlled: '1'
scopus_import: '1'
status: public
title: First and second sound in two-dimensional bosonic and fermionic superfluids
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 14
year: '2022'
...
