Recovery of a SINIS turnstile accuracy in a strongly non-equilibrium regime

Abstract

We perform a theoretical study of non-equilibrium effects in charge transport through a hybrid single-electron transistor based on a small normal metal (N) island with the gate-controlled number of electrons, tunnel-coupled to voltage-biased superconducting (S) electrodes (SINIS). Focusing on the turnstile mode of the transistor operation with the gate voltage driven periodically, and electrons on the island being out of equilibrium, we find that the current quantization accuracy is a non-monotonic function of the relaxation rate ${\Gamma }_{\mathcal{F}}$ of the distribution function $\mathcal{F}(\epsilon )$ on the island due to tunneling, as compared to the drive frequency $f$, electron-electron $1/{\tau }_{ee}$ and electron-phonon $1/{\tau }_{eph}$ relaxation rates. Surprisingly, in the strongly non-equilibrium regime, $f\gg {\Gamma }_{\mathcal{F}}\gg {\tau }_{ee}^{-1},{\tau }_{eph}^{-1}$, the turnstile current plateau is recovered, similarly to the ideal equilibrium regime, ${\tau }_{eph}^{-1}\gg {\Gamma }_{\mathcal{F}}$. The plateau is destroyed in the quasiequilibrium regime when the electron-electron relaxation is faster than tunneling.

14 pages, 9 figures

References in corpus (5)

• Measurement and Control of Quasiparticle Dynamics in a Superconducting Qubit
• Non-Poissonian Quantum Jumps of a Fluxonium Qubit due to Quasiparticle Excitations
• Trapping a single vortex and reducing quasiparticles in a superconducting resonator
• Non-adiabadic charge pumping in a hybrid SET transistor
• Nonequilibrium characteristics in all-superconducting tunnel structures

Cited by in corpus (3)

• Electronic structure of mesoscopic superconducting disk: Quasiparticle tunneling between the giant vortex core and disk edge
• Electron-phonon heat transfer in giant vortex states
• Suppression of back-tunnelling events in hybrid single-electron turnstiles by source-drain bias modulation