Quasiclassical fluctuations of the superconductor proximity gap in a chaotic system

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dc.creatorGoorden, M. C.
dc.creatorJacquod, Ph.
dc.creatorBeenakker, C. W. J.
dc.date2003-06-30
dc.date2004-01-14
dc.date.accessioned2026-07-07T02:52:07Z
dc.date.available2026-07-07T02:52:07Z
dc.descriptionWe calculate the sample-to-sample fluctuations in the excitation gap of a chaotic dynamical system coupled by a narrow lead to a superconductor. Quantum fluctuations on the order of magnitude of the level spacing, predicted by random-matrix theory, apply if $τ_E\ll\hbar/E_T$ (with $τ_E$ the Ehrenfest time and $E_T$ the Thouless energy). For $τ_E\agt\hbar/ E_T$ the fluctuations are much greater than the level spacing. We demonstrate the quasiclassical nature of the gap fluctuations in the large-$τ_E$ regime by correlating them to an integral over the classical dwell-time distribution.
dc.description4 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0306731
dc.identifierhttp://arxiv.org/abs/cond-mat/0306731
dc.identifierPhys. Rev. B 68, 220501(R) (2003)
dc.identifierdoi:10.1103/PhysRevB.68.220501
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/21718
dc.subjectMesoscale and Nanoscale Physics
dc.titleQuasiclassical fluctuations of the superconductor proximity gap in a chaotic system
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