Single-photon pump by Cooper-pair splitting

Anno: 2019

Autori: Mattia M., Wolfgang B., Gianluca R., Robert H.

Affiliazione autori: Univ Konstanz, Fachbereich Phys, D-78457 Constance, Germany. Univ Konstanz, Zukunftskolleg, D-78457 Constance, Germany.

Abstract: Hybrid quantum dot-oscillator systems have become attractive platforms to inspect quantum coherence effects at the nanoscale. Here, we investigate a Cooper-pair splitter setup consisting of two quantum dots, each linearly coupled to a local resonator. The latter can be realized either by a microwave cavity or a nanomechanical resonator. Focusing on the subgap regime, we demonstrate that cross-Andreev reflection, through which Cooper pairs are split into both dots, can induce nonlocal correlations between the two resonators. Harnessing these correlations allows to establish and control a nonlocal photon transfer between them. The proposed scheme can act as a photonic valve with single-photon accuracy, with potential applications for quantum heat engines and refrigerators involving mesoscopic resonators.


Volume: 1 (3)      Da Pagina: 033098  A: 033098

Maggiori informazioni: This research was supported by the German Excellence Initiative through the Zukunftskolleg and by the Deutsche Forschungsgemeinschaft through Collaborative Research Center SFB 767. R.H. acknowledges financial support from the Carl-Zeiss-Stiftung.
Parole chiavi: quantum dots, microwave resonators, hybrid circuit QED, Cooper pairs, mesoscopic superconductivity
DOI: 10.1103/PhysRevResearch.1.033098