---
_id: '9331'
abstract:
- lang: eng
  text: 'Quantum entanglement has been generated and verified in cold-atom experiments
    and used to make atom-interferometric measurements below the shot-noise limit.
    However, current state-of-the-art cold-atom devices exploit separable (i.e., unentangled)
    atomic states. This perspective piece asks the question: can entanglement usefully
    improve cold-atom sensors, in the sense that it gives new sensing capabilities
    unachievable with current state-of-the-art devices? We briefly review the state-of-the-art
    in precision cold-atom sensing, focusing on clocks and inertial sensors, identifying
    the potential benefits entanglement could bring to these devices, and the challenges
    that need to be overcome to realize these benefits. We survey demonstrated methods
    of generating metrologically useful entanglement in cold-atom systems, note their
    relative strengths and weaknesses, and assess their prospects for near-to-medium
    term quantum-enhanced cold-atom sensing.'
acknowledgement: We acknowledge fruitful discussions with John Close, Chris Freier,
  Kyle Hardman, Joseph Hope, and Paul Wigley, and insightful suggestions made by Franck
  Pereira dos Santos on behalf of the Atom Interferometry and Inertial Sensors team
  at SYRTE. S.S.S. was supported by an Australian Research Council Discovery Early
  Career Researcher Award (DECRA), Project No. DE200100495. O.H. was supported by
  IST Austria.
article_number: '140501'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Stuart S.
  full_name: Szigeti, Stuart S.
  last_name: Szigeti
- first_name: Onur
  full_name: Hosten, Onur
  id: 4C02D85E-F248-11E8-B48F-1D18A9856A87
  last_name: Hosten
  orcid: 0000-0002-2031-204X
- first_name: Simon A.
  full_name: Haine, Simon A.
  last_name: Haine
citation:
  ama: 'Szigeti SS, Hosten O, Haine SA. Improving cold-atom sensors with quantum entanglement:
    Prospects and challenges. <i>Applied Physics Letters</i>. 2021;118(14). doi:<a
    href="https://doi.org/10.1063/5.0050235">10.1063/5.0050235</a>'
  apa: 'Szigeti, S. S., Hosten, O., &#38; Haine, S. A. (2021). Improving cold-atom
    sensors with quantum entanglement: Prospects and challenges. <i>Applied Physics
    Letters</i>. AIP Publishing. <a href="https://doi.org/10.1063/5.0050235">https://doi.org/10.1063/5.0050235</a>'
  chicago: 'Szigeti, Stuart S., Onur Hosten, and Simon A. Haine. “Improving Cold-Atom
    Sensors with Quantum Entanglement: Prospects and Challenges.” <i>Applied Physics
    Letters</i>. AIP Publishing, 2021. <a href="https://doi.org/10.1063/5.0050235">https://doi.org/10.1063/5.0050235</a>.'
  ieee: 'S. S. Szigeti, O. Hosten, and S. A. Haine, “Improving cold-atom sensors with
    quantum entanglement: Prospects and challenges,” <i>Applied Physics Letters</i>,
    vol. 118, no. 14. AIP Publishing, 2021.'
  ista: 'Szigeti SS, Hosten O, Haine SA. 2021. Improving cold-atom sensors with quantum
    entanglement: Prospects and challenges. Applied Physics Letters. 118(14), 140501.'
  mla: 'Szigeti, Stuart S., et al. “Improving Cold-Atom Sensors with Quantum Entanglement:
    Prospects and Challenges.” <i>Applied Physics Letters</i>, vol. 118, no. 14, 140501,
    AIP Publishing, 2021, doi:<a href="https://doi.org/10.1063/5.0050235">10.1063/5.0050235</a>.'
  short: S.S. Szigeti, O. Hosten, S.A. Haine, Applied Physics Letters 118 (2021).
date_created: 2021-04-18T22:01:40Z
date_published: 2021-04-07T00:00:00Z
date_updated: 2023-08-07T14:36:42Z
day: '07'
department:
- _id: OnHo
doi: 10.1063/5.0050235
external_id:
  arxiv:
  - '2010.09168'
  isi:
  - '000637702100001'
intvolume: '       118'
isi: 1
issue: '14'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://arxiv.org/abs/2010.09168
month: '04'
oa: 1
oa_version: Preprint
publication: Applied Physics Letters
publication_identifier:
  issn:
  - '00036951'
publication_status: published
publisher: AIP Publishing
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Improving cold-atom sensors with quantum entanglement: Prospects and challenges'
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 118
year: '2021'
...
---
_id: '796'
abstract:
- lang: eng
  text: We present the fabrication and characterization of an aluminum transmon qubit
    on a silicon-on-insulator substrate. Key to the qubit fabrication is the use of
    an anhydrous hydrofluoric vapor process which selectively removes the lossy silicon
    oxide buried underneath the silicon device layer. For a 5.6 GHz qubit measured
    dispersively by a 7.1 GHz resonator, we find T1 = 3.5 μs and T∗2 = 2.2 μs. This
    process in principle permits the co-fabrication of silicon photonic and mechanical
    elements, providing a route towards chip-scale integration of electro-opto-mechanical
    transducers for quantum networking of superconducting microwave quantum circuits.
    The additional processing steps are compatible with established fabrication techniques
    for aluminum transmon qubits on silicon.
acknowledgement: This work was supported by the AFOSR MURI Quantum Photonic Matter
  (Grant No. 16RT0696), the AFOSR MURI Wiring Quantum Networks with Mechanical Transducers
  (Grant No. FA9550-15-1-0015), the Institute for Quantum Information and Matter,
  an NSF Physics Frontiers Center (Grant No. PHY-1125565) with the support of the
  Gordon and Betty Moore Foundation, and the Kavli Nanoscience Institute at Caltech.
  A.J.K. acknowledges the IQIM Postdoctoral Fellowship.
article_number: '042603'
article_processing_charge: No
author:
- first_name: Andrew J
  full_name: Keller, Andrew J
  last_name: Keller
- first_name: Paul
  full_name: Dieterle, Paul
  last_name: Dieterle
- first_name: Michael
  full_name: Fang, Michael
  last_name: Fang
- first_name: Brett
  full_name: Berger, Brett
  last_name: Berger
- first_name: Johannes M
  full_name: Fink, Johannes M
  id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
  last_name: Fink
  orcid: 0000-0001-8112-028X
- first_name: Oskar
  full_name: Painter, Oskar
  last_name: Painter
citation:
  ama: Keller AJ, Dieterle P, Fang M, Berger B, Fink JM, Painter O. Al transmon qubits
    on silicon on insulator for quantum device integration. <i>Applied Physics Letters</i>.
    2017;111(4). doi:<a href="https://doi.org/10.1063/1.4994661">10.1063/1.4994661</a>
  apa: Keller, A. J., Dieterle, P., Fang, M., Berger, B., Fink, J. M., &#38; Painter,
    O. (2017). Al transmon qubits on silicon on insulator for quantum device integration.
    <i>Applied Physics Letters</i>. American Institute of Physics. <a href="https://doi.org/10.1063/1.4994661">https://doi.org/10.1063/1.4994661</a>
  chicago: Keller, Andrew J, Paul Dieterle, Michael Fang, Brett Berger, Johannes M
    Fink, and Oskar Painter. “Al Transmon Qubits on Silicon on Insulator for Quantum
    Device Integration.” <i>Applied Physics Letters</i>. American Institute of Physics,
    2017. <a href="https://doi.org/10.1063/1.4994661">https://doi.org/10.1063/1.4994661</a>.
  ieee: A. J. Keller, P. Dieterle, M. Fang, B. Berger, J. M. Fink, and O. Painter,
    “Al transmon qubits on silicon on insulator for quantum device integration,” <i>Applied
    Physics Letters</i>, vol. 111, no. 4. American Institute of Physics, 2017.
  ista: Keller AJ, Dieterle P, Fang M, Berger B, Fink JM, Painter O. 2017. Al transmon
    qubits on silicon on insulator for quantum device integration. Applied Physics
    Letters. 111(4), 042603.
  mla: Keller, Andrew J., et al. “Al Transmon Qubits on Silicon on Insulator for Quantum
    Device Integration.” <i>Applied Physics Letters</i>, vol. 111, no. 4, 042603,
    American Institute of Physics, 2017, doi:<a href="https://doi.org/10.1063/1.4994661">10.1063/1.4994661</a>.
  short: A.J. Keller, P. Dieterle, M. Fang, B. Berger, J.M. Fink, O. Painter, Applied
    Physics Letters 111 (2017).
date_created: 2018-12-11T11:48:33Z
date_published: 2017-07-01T00:00:00Z
date_updated: 2023-09-27T12:13:36Z
day: '01'
department:
- _id: JoFi
doi: 10.1063/1.4994661
external_id:
  isi:
  - '000406779700031'
intvolume: '       111'
isi: 1
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://arxiv.org/abs/1703.10195
month: '07'
oa: 1
oa_version: Submitted Version
publication: Applied Physics Letters
publication_identifier:
  issn:
  - '00036951'
publication_status: published
publisher: American Institute of Physics
publist_id: '6857'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Al transmon qubits on silicon on insulator for quantum device integration
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 111
year: '2017'
...