---
_id: '13227'
abstract:
- lang: eng
text: Currently available quantum processors are dominated by noise, which severely
limits their applicability and motivates the search for new physical qubit encodings.
In this work, we introduce the inductively shunted transmon, a weakly flux-tunable
superconducting qubit that offers charge offset protection for all levels and
a 20-fold reduction in flux dispersion compared to the state-of-the-art resulting
in a constant coherence over a full flux quantum. The parabolic confinement provided
by the inductive shunt as well as the linearity of the geometric superinductor
facilitates a high-power readout that resolves quantum jumps with a fidelity and
QND-ness of >90% and without the need for a Josephson parametric amplifier. Moreover,
the device reveals quantum tunneling physics between the two prepared fluxon ground
states with a measured average decay time of up to 3.5 h. In the future, fast
time-domain control of the transition matrix elements could offer a new path forward
to also achieve full qubit control in the decay-protected fluxon basis.
acknowledged_ssus:
- _id: M-Shop
- _id: NanoFab
acknowledgement: The authors thank J. Koch for discussions and support with the scQubits
python package, I. Rozhansky and A. Poddubny for important insights into photon-assisted
tunneling, S. Barzanjeh and G. Arnold for theory, E. Redchenko, S. Pepic, the MIBA
workshop and the IST nanofabrication facility for technical contributions, as well
as L. Drmic, P. Zielinski and R. Sett for software development. We acknowledge the
prompt support of Quantum Machines to implement active state preparation with their
OPX+. This work was supported by a NOMIS foundation research grant (J.F.), the Austrian
Science Fund (FWF) through BeyondC F7105 (J.F.) and IST Austria.
article_number: '3968'
article_processing_charge: No
article_type: original
author:
- first_name: Farid
full_name: Hassani, Farid
id: 2AED110C-F248-11E8-B48F-1D18A9856A87
last_name: Hassani
orcid: 0000-0001-6937-5773
- first_name: Matilda
full_name: Peruzzo, Matilda
id: 3F920B30-F248-11E8-B48F-1D18A9856A87
last_name: Peruzzo
orcid: 0000-0002-3415-4628
- first_name: Lucky
full_name: Kapoor, Lucky
id: 84b9700b-15b2-11ec-abd3-831089e67615
last_name: Kapoor
- first_name: Andrea
full_name: Trioni, Andrea
id: 42F71B44-F248-11E8-B48F-1D18A9856A87
last_name: Trioni
- first_name: Martin
full_name: Zemlicka, Martin
id: 2DCF8DE6-F248-11E8-B48F-1D18A9856A87
last_name: Zemlicka
- first_name: Johannes M
full_name: Fink, Johannes M
id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
last_name: Fink
orcid: 0000-0001-8112-028X
citation:
ama: Hassani F, Peruzzo M, Kapoor L, Trioni A, Zemlicka M, Fink JM. Inductively
shunted transmons exhibit noise insensitive plasmon states and a fluxon decay
exceeding 3 hours. Nature Communications. 2023;14. doi:10.1038/s41467-023-39656-2
apa: Hassani, F., Peruzzo, M., Kapoor, L., Trioni, A., Zemlicka, M., & Fink,
J. M. (2023). Inductively shunted transmons exhibit noise insensitive plasmon
states and a fluxon decay exceeding 3 hours. Nature Communications. Springer
Nature. https://doi.org/10.1038/s41467-023-39656-2
chicago: Hassani, Farid, Matilda Peruzzo, Lucky Kapoor, Andrea Trioni, Martin Zemlicka,
and Johannes M Fink. “Inductively Shunted Transmons Exhibit Noise Insensitive
Plasmon States and a Fluxon Decay Exceeding 3 Hours.” Nature Communications.
Springer Nature, 2023. https://doi.org/10.1038/s41467-023-39656-2.
ieee: F. Hassani, M. Peruzzo, L. Kapoor, A. Trioni, M. Zemlicka, and J. M. Fink,
“Inductively shunted transmons exhibit noise insensitive plasmon states and a
fluxon decay exceeding 3 hours,” Nature Communications, vol. 14. Springer
Nature, 2023.
ista: Hassani F, Peruzzo M, Kapoor L, Trioni A, Zemlicka M, Fink JM. 2023. Inductively
shunted transmons exhibit noise insensitive plasmon states and a fluxon decay
exceeding 3 hours. Nature Communications. 14, 3968.
mla: Hassani, Farid, et al. “Inductively Shunted Transmons Exhibit Noise Insensitive
Plasmon States and a Fluxon Decay Exceeding 3 Hours.” Nature Communications,
vol. 14, 3968, Springer Nature, 2023, doi:10.1038/s41467-023-39656-2.
short: F. Hassani, M. Peruzzo, L. Kapoor, A. Trioni, M. Zemlicka, J.M. Fink, Nature
Communications 14 (2023).
date_created: 2023-07-16T22:01:08Z
date_published: 2023-07-05T00:00:00Z
date_updated: 2023-12-13T11:32:25Z
day: '05'
ddc:
- '530'
department:
- _id: JoFi
doi: 10.1038/s41467-023-39656-2
external_id:
isi:
- '001024729900009'
pmid:
- '37407570'
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creator: dernst
date_created: 2023-07-18T08:43:07Z
date_updated: 2023-07-18T08:43:07Z
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oa_version: Published Version
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project:
- _id: 26927A52-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: F07105
name: Integrating superconducting quantum circuits
- _id: 2622978C-B435-11E9-9278-68D0E5697425
name: Hybrid Semiconductor - Superconductor Quantum Devices
publication: Nature Communications
publication_identifier:
eissn:
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publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: Inductively shunted transmons exhibit noise insensitive plasmon states and
a fluxon decay exceeding 3 hours
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)
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type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
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...