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

Autor:	Kamp, Mathias, Sothmann, Björn
Rok vydání:	2020
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Superconductivity
Zdroj:	Phys. Rev. B 103, 045414 (2021)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.103.045414
Popis:	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. Comment: 11 pages, 7 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2010.00535 Zobrazit plný text záznamu View this record from Arxiv