Efficient Microwave Photon-to-Electron Conversion in a High-Impedance Quantum Circuit - Laboratoire de Physique des Solides d'Orsay
Article Dans Une Revue Physical Review Letters Année : 2024

Efficient Microwave Photon-to-Electron Conversion in a High-Impedance Quantum Circuit

Ognjen Stanisavljević
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Julien Gabelli
Marco Aprili
Jèrôme Estève
Julien Basset

Résumé

We demonstrate an efficient and continuous microwave photon-to-electron converter with large quantum efficiency (83%) and low dark current. These unique properties are enabled by the use of a high kinetic inductance disordered superconductor, granular aluminium, to enhance light-matter interaction and the coupling of microwave photons to electron tunneling processes. As a consequence of strong coupling, we observe both linear and nonlinear photon-assisted processes where two, three, and four photons are converted into a single electron at unprecedentedly low light intensities. Theoretical predictions, which require quantization of the photonic field within a quantum master equation framework, reproduce well the experimental data. This experimental advancement brings the foundation for high-efficiency detection of individual microwave photons using charge-based detection techniques.
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Dates et versions

hal-04678675 , version 1 (04-11-2024)

Identifiants

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Ognjen Stanisavljević, J.-C Philippe, Julien Gabelli, Marco Aprili, Jèrôme Estève, et al.. Efficient Microwave Photon-to-Electron Conversion in a High-Impedance Quantum Circuit. Physical Review Letters, 2024, 133 (7), pp.076302. ⟨10.1103/PhysRevLett.133.076302⟩. ⟨hal-04678675⟩
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