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Nonclassical Photon-Assisted Transport in Superconducting Tunnel Junctions

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2025

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http://arxiv.org/abs/2507.22662

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Advances in circuit quantum electrodynamics have enabled the generation of arbitrary nonclassical microwave states and paved the way for addressing novel physics questions. 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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530 Physik

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Mesoscale and Nanoscale Physics, Superconductivity, Tunnel Junctions

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ISO 690HÜBLER, Matthias, Juan Carlos CUEVAS, Wolfgang BELZIG, 2025. Nonclassical Photon-Assisted Transport in Superconducting Tunnel Junctions
BibTex
@unpublished{Hubler2025-07-30Noncl-74430,
  title={Nonclassical Photon-Assisted Transport in Superconducting Tunnel Junctions},
  year={2025},
  author={Hübler, Matthias and Cuevas, Juan Carlos and Belzig, Wolfgang}
}
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