Quantum phase slips and voltage fluctuations in superconducting nanowires

Abstract

We argue that quantum phase slips (QPS) may generate non‐equilibrium voltage fluctuations in superconducting nanowires. In the low frequency limit we evaluate all cumulants of the voltage operator which obey Poisson statistics and show a power law dependence on the external bias. We specifically address quantum shot noise which power spectrum may depend non‐monotonously on temperature. In the long wire limit decreases with increasing frequency Ω and vanishes beyond a threshold value of Ω at . Our predictions can be directly tested in future experiments with superconducting nanowires.