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 $S_{\Omega }$ may depend non-monotonously on temperature. In the long wire limit $S_{\Omega }$ decreases with increasing frequency $\Omega$ and vanishes beyond a threshold value of $\Omega$ at $T\to 0$. Our predictions can be directly tested in future experiments with superconducting nanowires.

8 pages, 4 figures, International Conference Frontiers of Quantum and Mesoscopic Thermodynamics Prague, Czech Republic 27 July - 1 August 2015

References in corpus (2)

• Quantum fluctuations in ultranarrow superconducting nanowires
• Thermal fluctuations in superconducting nanowires

Cited by in corpus (1)

• Full counting statistics of quantum phase slips