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Nonclassical photon-assisted transport in superconducting tunnel junctions

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2025

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https://doi.org/10.1103/64gy-9vnc
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Deutsche Forschungsgemeinschaft (DFG): SFB 1432, 425217212

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Physical Review B. American Physical Society (APS). 2025, 112(21), 214501. ISSN 2469-9950. eISSN 2469-9969. Verfügbar unter: doi: 10.1103/64gy-9vnc

Zusammenfassung

Advances in circuit quantum electrodynamics have enabled the generation of arbitrary nonclassical microwave states, enabling progress in physics. Here, we present a theoretical study of the electrical current in a Josephson tunnel junction interacting with a nonclassical electromagnetic environment. This allows us to generalize classical transport phenomena like photon-assisted tunneling and Shapiro steps to the quantum regime. We predict that the analysis of the supercurrent in such a setup enables the complete reconstruction of quantum states of the electromagnetic environment, something that is not possible with normal tunnel junctions.

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ISO 690HÜBLER, Matthias, Juan Carlos CUEVAS, Wolfgang BELZIG, 2025. Nonclassical photon-assisted transport in superconducting tunnel junctions. In: Physical Review B. American Physical Society (APS). 2025, 112(21), 214501. ISSN 2469-9950. eISSN 2469-9969. Verfügbar unter: doi: 10.1103/64gy-9vnc
BibTex
@article{Hubler2025-12-01Noncl-76273,
  title={Nonclassical photon-assisted transport in superconducting tunnel junctions},
  year={2025},
  doi={10.1103/64gy-9vnc},
  number={21},
  volume={112},
  issn={2469-9950},
  journal={Physical Review B},
  author={Hübler, Matthias and Cuevas, Juan Carlos and Belzig, Wolfgang},
  note={Article Number: 214501}
}
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