Anomalous Josephson current through a driven double quantum dot

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Anomalous Josephson current through a driven double quantum dot. / Ortega-Taberner, Carlos; Jauho, Antti-Pekka; Paaske, Jens.

In: Physical Review B, Vol. 107, No. 11, 115165, 29.03.2023.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Ortega-Taberner, C, Jauho, A-P & Paaske, J 2023, 'Anomalous Josephson current through a driven double quantum dot', Physical Review B, vol. 107, no. 11, 115165. https://doi.org/10.1103/PhysRevB.107.115165

APA

Ortega-Taberner, C., Jauho, A-P., & Paaske, J. (2023). Anomalous Josephson current through a driven double quantum dot. Physical Review B, 107(11), [115165]. https://doi.org/10.1103/PhysRevB.107.115165

Vancouver

Ortega-Taberner C, Jauho A-P, Paaske J. Anomalous Josephson current through a driven double quantum dot. Physical Review B. 2023 Mar 29;107(11). 115165. https://doi.org/10.1103/PhysRevB.107.115165

Author

Ortega-Taberner, Carlos ; Jauho, Antti-Pekka ; Paaske, Jens. / Anomalous Josephson current through a driven double quantum dot. In: Physical Review B. 2023 ; Vol. 107, No. 11.

Bibtex

@article{29d3173c040640f48d814f9e7ef0f268,
title = "Anomalous Josephson current through a driven double quantum dot",
abstract = "Josephson junctions based on quantum dots offer a convenient tunability by means of local gates. Here we analyze a Josephson junction based on a serial double quantum dot in which the two dots are individually gated by phase-shifted microwave tones of equal frequency. We calculate the time-averaged current across the junction and determine how the phase shift between the drives modifies the current-phase relation of the junction. Breaking particle-hole symmetry on the dots is found to give rise to a finite average anomalous Josephson current with phase bias between the superconductors fixed to zero. This microwave gated weak link thus realizes a tunable {"}Floquet v0 junction{"} with maximum critical current achieved for driving frequencies slightly off resonance with the subgap excitation energy. We provide numerical results supported by an analytical analysis for infinite superconducting gap and weak interdot coupling. We identify an interaction-driven 0-ir transition of anomalous Josephson current as a function of driving phase difference. Finally, we show that this junction can be tuned so as to provide for complete rectification of the time-averaged Josephson current-phase relation.",
keywords = "COHERENT MANIPULATION, TRANSPORT, STATES, MOLECULES, DIODE",
author = "Carlos Ortega-Taberner and Antti-Pekka Jauho and Jens Paaske",
year = "2023",
month = mar,
day = "29",
doi = "10.1103/PhysRevB.107.115165",
language = "English",
volume = "107",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "11",

}

RIS

TY - JOUR

T1 - Anomalous Josephson current through a driven double quantum dot

AU - Ortega-Taberner, Carlos

AU - Jauho, Antti-Pekka

AU - Paaske, Jens

PY - 2023/3/29

Y1 - 2023/3/29

N2 - Josephson junctions based on quantum dots offer a convenient tunability by means of local gates. Here we analyze a Josephson junction based on a serial double quantum dot in which the two dots are individually gated by phase-shifted microwave tones of equal frequency. We calculate the time-averaged current across the junction and determine how the phase shift between the drives modifies the current-phase relation of the junction. Breaking particle-hole symmetry on the dots is found to give rise to a finite average anomalous Josephson current with phase bias between the superconductors fixed to zero. This microwave gated weak link thus realizes a tunable "Floquet v0 junction" with maximum critical current achieved for driving frequencies slightly off resonance with the subgap excitation energy. We provide numerical results supported by an analytical analysis for infinite superconducting gap and weak interdot coupling. We identify an interaction-driven 0-ir transition of anomalous Josephson current as a function of driving phase difference. Finally, we show that this junction can be tuned so as to provide for complete rectification of the time-averaged Josephson current-phase relation.

AB - Josephson junctions based on quantum dots offer a convenient tunability by means of local gates. Here we analyze a Josephson junction based on a serial double quantum dot in which the two dots are individually gated by phase-shifted microwave tones of equal frequency. We calculate the time-averaged current across the junction and determine how the phase shift between the drives modifies the current-phase relation of the junction. Breaking particle-hole symmetry on the dots is found to give rise to a finite average anomalous Josephson current with phase bias between the superconductors fixed to zero. This microwave gated weak link thus realizes a tunable "Floquet v0 junction" with maximum critical current achieved for driving frequencies slightly off resonance with the subgap excitation energy. We provide numerical results supported by an analytical analysis for infinite superconducting gap and weak interdot coupling. We identify an interaction-driven 0-ir transition of anomalous Josephson current as a function of driving phase difference. Finally, we show that this junction can be tuned so as to provide for complete rectification of the time-averaged Josephson current-phase relation.

KW - COHERENT MANIPULATION

KW - TRANSPORT

KW - STATES

KW - MOLECULES

KW - DIODE

U2 - 10.1103/PhysRevB.107.115165

DO - 10.1103/PhysRevB.107.115165

M3 - Journal article

VL - 107

JO - Physical Review B

JF - Physical Review B

SN - 2469-9950

IS - 11

M1 - 115165

ER -

ID: 346048036