Characterizing and Optimizing Qubit Coherence Based on SQUID Geometry

Jochen Braumüller; Leon Ding; Antti P. Vepsäläinen; Youngkyu Sung; Morten Kjaergaard; Tim Menke; Roni Winik; David Kim; Bethany M. Niedzielski; Alexander Melville; Jonilyn L. Yoder; Cyrus F. Hirjibehedin; Terry P. Orlando; Simon Gustavsson; William D. Oliver

doi:10.1103/PhysRevApplied.13.054079

Characterizing and Optimizing Qubit Coherence Based on SQUID Geometry

Jochen Braumüller
, Leon Ding
, Antti P. Vepsäläinen
, Youngkyu Sung
, Morten Kjaergaard
, Tim Menke
, Roni Winik
, David Kim
, Bethany M. Niedzielski
, Alexander Melville
, Jonilyn L. Yoder
, Cyrus F. Hirjibehedin
, Terry P. Orlando
, Simon Gustavsson
, William D. Oliver

Research output: Contribution to journal › Article › peer-review

66 Scopus citations

Abstract

The dominant source of decoherence in contemporary frequency-tunable superconducting qubits is 1/f flux noise. To understand its origin and find ways to minimize its impact, we systematically study flux noise amplitudes in more than 50 flux qubits with varied superconducting quantum interference device (SQUID) geometry parameters and compare our results to a microscopic model of magnetic spin defects located at the interfaces surrounding the SQUID loops. Our data are in agreement with an extension of the previously proposed model, based on numerical simulations of the current distribution in the investigated SQUIDs. Our results and detailed model provide a guide for minimizing the flux noise susceptibility in future circuits.

Original language	English
Article number	054079
Journal	Physical Review Applied
Volume	13
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevApplied.13.054079
State	Published - 1 May 2020
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevApplied.13.054079

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Braumüller, J., Ding, L., Vepsäläinen, A. P., Sung, Y., Kjaergaard, M., Menke, T., Winik, R., Kim, D., Niedzielski, B. M., Melville, A., Yoder, J. L., Hirjibehedin, C. F., Orlando, T. P., Gustavsson, S., & Oliver, W. D. (2020). Characterizing and Optimizing Qubit Coherence Based on SQUID Geometry. Physical Review Applied, 13(5), Article 054079. https://doi.org/10.1103/PhysRevApplied.13.054079

@article{2e6c6c50d3df4e58b90119a8dc4d6b51,

title = "Characterizing and Optimizing Qubit Coherence Based on SQUID Geometry",

abstract = "The dominant source of decoherence in contemporary frequency-tunable superconducting qubits is 1/f flux noise. To understand its origin and find ways to minimize its impact, we systematically study flux noise amplitudes in more than 50 flux qubits with varied superconducting quantum interference device (SQUID) geometry parameters and compare our results to a microscopic model of magnetic spin defects located at the interfaces surrounding the SQUID loops. Our data are in agreement with an extension of the previously proposed model, based on numerical simulations of the current distribution in the investigated SQUIDs. Our results and detailed model provide a guide for minimizing the flux noise susceptibility in future circuits.",

author = "Jochen Braum{\"u}ller and Leon Ding and Veps{\"a}l{\"a}inen, \{Antti P.\} and Youngkyu Sung and Morten Kjaergaard and Tim Menke and Roni Winik and David Kim and Niedzielski, \{Bethany M.\} and Alexander Melville and Yoder, \{Jonilyn L.\} and Hirjibehedin, \{Cyrus F.\} and Orlando, \{Terry P.\} and Simon Gustavsson and Oliver, \{William D.\}",

note = "Publisher Copyright: {\textcopyright} 2020 American Physical Society.",

year = "2020",

month = may,

day = "1",

doi = "10.1103/PhysRevApplied.13.054079",

language = "English",

volume = "13",

journal = "Physical Review Applied",

issn = "2331-7019",

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Braumüller, J, Ding, L, Vepsäläinen, AP, Sung, Y, Kjaergaard, M, Menke, T, Winik, R, Kim, D, Niedzielski, BM, Melville, A, Yoder, JL, Hirjibehedin, CF, Orlando, TP, Gustavsson, S & Oliver, WD 2020, 'Characterizing and Optimizing Qubit Coherence Based on SQUID Geometry', Physical Review Applied, vol. 13, no. 5, 054079. https://doi.org/10.1103/PhysRevApplied.13.054079

TY - JOUR

T1 - Characterizing and Optimizing Qubit Coherence Based on SQUID Geometry

AU - Braumüller, Jochen

AU - Ding, Leon

AU - Vepsäläinen, Antti P.

AU - Sung, Youngkyu

AU - Kjaergaard, Morten

AU - Menke, Tim

AU - Winik, Roni

AU - Kim, David

AU - Niedzielski, Bethany M.

AU - Melville, Alexander

AU - Yoder, Jonilyn L.

AU - Hirjibehedin, Cyrus F.

AU - Orlando, Terry P.

AU - Gustavsson, Simon

AU - Oliver, William D.

PY - 2020/5/1

Y1 - 2020/5/1

N2 - The dominant source of decoherence in contemporary frequency-tunable superconducting qubits is 1/f flux noise. To understand its origin and find ways to minimize its impact, we systematically study flux noise amplitudes in more than 50 flux qubits with varied superconducting quantum interference device (SQUID) geometry parameters and compare our results to a microscopic model of magnetic spin defects located at the interfaces surrounding the SQUID loops. Our data are in agreement with an extension of the previously proposed model, based on numerical simulations of the current distribution in the investigated SQUIDs. Our results and detailed model provide a guide for minimizing the flux noise susceptibility in future circuits.

AB - The dominant source of decoherence in contemporary frequency-tunable superconducting qubits is 1/f flux noise. To understand its origin and find ways to minimize its impact, we systematically study flux noise amplitudes in more than 50 flux qubits with varied superconducting quantum interference device (SQUID) geometry parameters and compare our results to a microscopic model of magnetic spin defects located at the interfaces surrounding the SQUID loops. Our data are in agreement with an extension of the previously proposed model, based on numerical simulations of the current distribution in the investigated SQUIDs. Our results and detailed model provide a guide for minimizing the flux noise susceptibility in future circuits.

UR - https://www.scopus.com/pages/publications/85085841464

U2 - 10.1103/PhysRevApplied.13.054079

DO - 10.1103/PhysRevApplied.13.054079

M3 - Article

AN - SCOPUS:85085841464

SN - 2331-7019

VL - 13

JO - Physical Review Applied

JF - Physical Review Applied

IS - 5

M1 - 054079

ER -

Characterizing and Optimizing Qubit Coherence Based on SQUID Geometry

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