Anharmonicity of a superconducting qubit with a few-mode Josephson junction

Research output: Contribution to journalJournal articlepeer-review

Standard

Anharmonicity of a superconducting qubit with a few-mode Josephson junction. / Kringhøj, Anders; Casparis, Lucas; Hell, Michael; Larsen, Thorvald Wadum; Kuemmeth, Ferdinand; Leijnse, Martin Christian; Flensberg, Karsten; Krogstrup Jeppesen, Peter; Nygård, Jesper; Petersson, Karl David; Marcus, Charles M.

In: Physical Review B, Vol. 97, No. 6, 060508, 2018.

Research output: Contribution to journalJournal articlepeer-review

Harvard

Kringhøj, A, Casparis, L, Hell, M, Larsen, TW, Kuemmeth, F, Leijnse, MC, Flensberg, K, Krogstrup Jeppesen, P, Nygård, J, Petersson, KD & Marcus, CM 2018, 'Anharmonicity of a superconducting qubit with a few-mode Josephson junction', Physical Review B, vol. 97, no. 6, 060508. https://doi.org/10.1103/PhysRevB.97.060508

APA

Kringhøj, A., Casparis, L., Hell, M., Larsen, T. W., Kuemmeth, F., Leijnse, M. C., Flensberg, K., Krogstrup Jeppesen, P., Nygård, J., Petersson, K. D., & Marcus, C. M. (2018). Anharmonicity of a superconducting qubit with a few-mode Josephson junction. Physical Review B, 97(6), [060508]. https://doi.org/10.1103/PhysRevB.97.060508

Vancouver

Kringhøj A, Casparis L, Hell M, Larsen TW, Kuemmeth F, Leijnse MC et al. Anharmonicity of a superconducting qubit with a few-mode Josephson junction. Physical Review B. 2018;97(6). 060508. https://doi.org/10.1103/PhysRevB.97.060508

Author

Kringhøj, Anders ; Casparis, Lucas ; Hell, Michael ; Larsen, Thorvald Wadum ; Kuemmeth, Ferdinand ; Leijnse, Martin Christian ; Flensberg, Karsten ; Krogstrup Jeppesen, Peter ; Nygård, Jesper ; Petersson, Karl David ; Marcus, Charles M. / Anharmonicity of a superconducting qubit with a few-mode Josephson junction. In: Physical Review B. 2018 ; Vol. 97, No. 6.

Bibtex

@article{8eb8d68f706c40169276c0f31be90a50,
title = "Anharmonicity of a superconducting qubit with a few-mode Josephson junction",
abstract = "Coherent operation of gate-voltage-controlled hybrid transmon qubits (gatemons) based on semiconductor nanowires was recently demonstrated. Here we experimentally investigate the anharmonicity in epitaxial InAs-Al Josephson junctions, a key parameter for their use as a qubit. Anharmonicity is found to be reduced by roughly a factor of 2 compared to conventional metallic junctions and dependent on gate voltage. Experimental results are consistent with a theoretical model, indicating that Josephson coupling is mediated by a small number of highly transmitting modes in the semiconductor junction.",
author = "Anders Kringh{\o}j and Lucas Casparis and Michael Hell and Larsen, {Thorvald Wadum} and Ferdinand Kuemmeth and Leijnse, {Martin Christian} and Karsten Flensberg and {Krogstrup Jeppesen}, Peter and Jesper Nyg{\aa}rd and Petersson, {Karl David} and Marcus, {Charles M.}",
note = "[Qdev]",
year = "2018",
doi = "10.1103/PhysRevB.97.060508",
language = "English",
volume = "97",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "6",

}

RIS

TY - JOUR

T1 - Anharmonicity of a superconducting qubit with a few-mode Josephson junction

AU - Kringhøj, Anders

AU - Casparis, Lucas

AU - Hell, Michael

AU - Larsen, Thorvald Wadum

AU - Kuemmeth, Ferdinand

AU - Leijnse, Martin Christian

AU - Flensberg, Karsten

AU - Krogstrup Jeppesen, Peter

AU - Nygård, Jesper

AU - Petersson, Karl David

AU - Marcus, Charles M.

N1 - [Qdev]

PY - 2018

Y1 - 2018

N2 - Coherent operation of gate-voltage-controlled hybrid transmon qubits (gatemons) based on semiconductor nanowires was recently demonstrated. Here we experimentally investigate the anharmonicity in epitaxial InAs-Al Josephson junctions, a key parameter for their use as a qubit. Anharmonicity is found to be reduced by roughly a factor of 2 compared to conventional metallic junctions and dependent on gate voltage. Experimental results are consistent with a theoretical model, indicating that Josephson coupling is mediated by a small number of highly transmitting modes in the semiconductor junction.

AB - Coherent operation of gate-voltage-controlled hybrid transmon qubits (gatemons) based on semiconductor nanowires was recently demonstrated. Here we experimentally investigate the anharmonicity in epitaxial InAs-Al Josephson junctions, a key parameter for their use as a qubit. Anharmonicity is found to be reduced by roughly a factor of 2 compared to conventional metallic junctions and dependent on gate voltage. Experimental results are consistent with a theoretical model, indicating that Josephson coupling is mediated by a small number of highly transmitting modes in the semiconductor junction.

U2 - 10.1103/PhysRevB.97.060508

DO - 10.1103/PhysRevB.97.060508

M3 - Journal article

AN - SCOPUS:85043783972

VL - 97

JO - Physical Review B

JF - Physical Review B

SN - 2469-9950

IS - 6

M1 - 060508

ER -

ID: 199595142