Instabilities and resistance fluctuations in thin accelerated superconducting rings

TL;DR

This paper investigates how superconducting rings behave under constant emf, focusing on phase slips and resistance fluctuations caused by non-equilibrium conditions, thermal noise, and resistivity.

Contribution

It provides new analytical and numerical insights into phase slip phenomena and resistance fluctuations in driven superconducting rings under non-equilibrium conditions.

Findings

Phase slips increase with emf strength.

Thermal noise influences phase slip frequency.

Dissipation correlates with resistivity and emf.

Abstract

The non-equilibrium properties of a driven quasi-one dimensional superconducting ring subjected to a constant electromotive force ({\it emf}) is studied. The {\it emf} accelerates the superconducting electrons until the critical current is reached and a dissipative phase slip occurs that lowers the current. The phase slip phenomena is examined as a function of the strength of the {\it emf}, thermal noise, and normal state resistivity. Numerical and analytic methods are used to make detailed predictions for the magnitude of phase slips and subsequent dissipation.