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Quasiparticles of a periodically driven quantum dot coupled between superconducting and normal leads

B. Baran, T. Domański

DOI 10.1103/PhysRevB.100.085414 · Physical Review B

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Abstract

We investigate subgap quasiparticles of a quantum dot coupled to the superconducting and normal leads, whose energy level is periodically driven by an external potential. Using the Floquet formalism we determine the quasienergies and analyze redistribution of their spectral weights between individual harmonics upon varying the frequency and amplitude of the driving potential. We propose feasible spectroscopic methods for probing the in-gap quasiparticles observable in the differential conductance of the charge current averaged over a period of oscillations.

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