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Paper detail

Higgs-like pair amplitude dynamics in superconductor-quantum dot hybrids

We consider a quantum dot weakly tunnel coupled to superconducting reservoirs. A finite superconducting pair amplitude can be induced on the dot via the proximity effect. We investigate the dynamics of the induced pair amplitude after a quench and under periodic driving of the system by means of a real-time diagrammatic approach. We find that the quench dynamics is dominated by an exponential decay towards equilibrium In contrast, the periodically driven system can sustain coherent oscillations of both the amplitude and the phase of the induced pair amplitude in analogy to Higgs and Nambu-Goldstone modes in driven bulk superconductors.

preprint2020arXivOpen access
Mathias KampBjörn Sothmann
cond-mat.mes-hallcond-mat.supr-con
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Mathias KampBjörn Sothmann

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