Tunneling and Relaxation of Single Quasiparticles in a Normal-Superconductor-Normal Single Electron Transistor

Abstract

We investigate the properties of a hybrid single electron transistor, involving a small superconducting island sandwiched between normal metal leads, which is driven by dc plus ac voltages. In order to describe its properties we derive from the microscopic theory a set of coupled equations. They consist of a master equation for the probability to find excess charges on the island, with rates depending on the distribution of non-equilibrium quasiparticles. Their dynamics follows from a kinetic equation which accounts for the excitation by single-electron tunneling as well as the relaxation and eventual recombination due to the interaction with phonons. Our low-temperature results compare well with recent experimental findings obtained for ac-driven hybrid single-electron turnstiles.

13 pages, 7 figures

References in corpus (2)

• Non-adiabadic charge pumping in a hybrid SET transistor
• Excitation of superconducting qubits from hot non-equilibrium quasiparticles

Cited by in corpus (9)

• Electronic Decoherence of Two-Level Systems in a Josephson Junction
• Dissipation driven dynamical topological phase transitions in two-dimensional superconductors
• The parity effect in Josephson junction arrays
• Parity effect and single-electron injection for Josephson-junction chains deep in the insulating state
• Creating photon-number squeezed strong microwave fields by a Cooper-pair injection laser
• Correlated transport through junction arrays in the small Josephson energy limit: incoherent Cooper-pairs and hot electrons
• Diagrammatic description of a system coupled strongly to a bosonic bath
• Clocked single-spin source based on a spin-split superconductor
• Interplay of charge and vorticity quantization in superconducting Coulomb blockaded island