Parity-Protected Superconductor-Semiconductor Qubit

Research output: Contribution to journalJournal articlepeer-review

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Parity-Protected Superconductor-Semiconductor Qubit. / Larsen, T. W.; Gershenson, M. E.; Casparis, L.; Kringhj, A.; Pearson, N. J.; McNeil, R. P. G.; Kuemmeth, F.; Krogstrup, P.; Petersson, K. D.; Marcus, C. M.

In: Physical Review Letters, Vol. 125, No. 5, 056801, 30.07.2020.

Research output: Contribution to journalJournal articlepeer-review

Harvard

Larsen, TW, Gershenson, ME, Casparis, L, Kringhj, A, Pearson, NJ, McNeil, RPG, Kuemmeth, F, Krogstrup, P, Petersson, KD & Marcus, CM 2020, 'Parity-Protected Superconductor-Semiconductor Qubit', Physical Review Letters, vol. 125, no. 5, 056801. https://doi.org/10.1103/PhysRevLett.125.056801

APA

Larsen, T. W., Gershenson, M. E., Casparis, L., Kringhj, A., Pearson, N. J., McNeil, R. P. G., Kuemmeth, F., Krogstrup, P., Petersson, K. D., & Marcus, C. M. (2020). Parity-Protected Superconductor-Semiconductor Qubit. Physical Review Letters, 125(5), [056801]. https://doi.org/10.1103/PhysRevLett.125.056801

Vancouver

Larsen TW, Gershenson ME, Casparis L, Kringhj A, Pearson NJ, McNeil RPG et al. Parity-Protected Superconductor-Semiconductor Qubit. Physical Review Letters. 2020 Jul 30;125(5). 056801. https://doi.org/10.1103/PhysRevLett.125.056801

Author

Larsen, T. W. ; Gershenson, M. E. ; Casparis, L. ; Kringhj, A. ; Pearson, N. J. ; McNeil, R. P. G. ; Kuemmeth, F. ; Krogstrup, P. ; Petersson, K. D. ; Marcus, C. M. / Parity-Protected Superconductor-Semiconductor Qubit. In: Physical Review Letters. 2020 ; Vol. 125, No. 5.

Bibtex

@article{fd56147af84e4d3c91c3a10a747b8454,
title = "Parity-Protected Superconductor-Semiconductor Qubit",
abstract = "Coherence of superconducting qubits can be improved by implementing designs that protect the parity of Cooper pairs on superconducting islands. Here, we introduce a parity-protected qubit based on voltage-controlled semiconductor nanowire Josephson junctions, taking advantage of the higher harmonic content in the energy-phase relation of few-channel junctions. A symmetric interferometer formed by two such junctions, gate-tuned into balance and frustrated by a half-quantum of applied flux, yields a cos (2(phi)) Josephson element, reflecting coherent transport of pairs of Cooper pairs. We demonstrate that relaxation of the qubit can be suppressed tenfold by tuning into the protected regime.",
author = "Larsen, {T. W.} and Gershenson, {M. E.} and L. Casparis and A. Kringhj and Pearson, {N. J.} and McNeil, {R. P. G.} and F. Kuemmeth and P. Krogstrup and Petersson, {K. D.} and Marcus, {C. M.}",
year = "2020",
month = jul,
day = "30",
doi = "10.1103/PhysRevLett.125.056801",
language = "English",
volume = "125",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "5",

}

RIS

TY - JOUR

T1 - Parity-Protected Superconductor-Semiconductor Qubit

AU - Larsen, T. W.

AU - Gershenson, M. E.

AU - Casparis, L.

AU - Kringhj, A.

AU - Pearson, N. J.

AU - McNeil, R. P. G.

AU - Kuemmeth, F.

AU - Krogstrup, P.

AU - Petersson, K. D.

AU - Marcus, C. M.

PY - 2020/7/30

Y1 - 2020/7/30

N2 - Coherence of superconducting qubits can be improved by implementing designs that protect the parity of Cooper pairs on superconducting islands. Here, we introduce a parity-protected qubit based on voltage-controlled semiconductor nanowire Josephson junctions, taking advantage of the higher harmonic content in the energy-phase relation of few-channel junctions. A symmetric interferometer formed by two such junctions, gate-tuned into balance and frustrated by a half-quantum of applied flux, yields a cos (2(phi)) Josephson element, reflecting coherent transport of pairs of Cooper pairs. We demonstrate that relaxation of the qubit can be suppressed tenfold by tuning into the protected regime.

AB - Coherence of superconducting qubits can be improved by implementing designs that protect the parity of Cooper pairs on superconducting islands. Here, we introduce a parity-protected qubit based on voltage-controlled semiconductor nanowire Josephson junctions, taking advantage of the higher harmonic content in the energy-phase relation of few-channel junctions. A symmetric interferometer formed by two such junctions, gate-tuned into balance and frustrated by a half-quantum of applied flux, yields a cos (2(phi)) Josephson element, reflecting coherent transport of pairs of Cooper pairs. We demonstrate that relaxation of the qubit can be suppressed tenfold by tuning into the protected regime.

U2 - 10.1103/PhysRevLett.125.056801

DO - 10.1103/PhysRevLett.125.056801

M3 - Journal article

C2 - 32794832

VL - 125

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 5

M1 - 056801

ER -

ID: 246780043