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arXiv · 1901.02575

Quantum phase slips and voltage fluctuations in superconducting nanowires

Andrew G. Semenov·Andrei D. Zaikin
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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 $S_Ω$ may depend non-monotonously on temperature. In the long wire limit $S_Ω$ decreases with increasing frequency $Ω$ and vanishes beyond a threshold value of $Ω$ at $T \to 0$. Our predictions can be directly tested in future experiments with superconducting nanowires.

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Andrew G. Semenov, Andrei D. Zaikin. 2019-01-09. Quantum phase slips and voltage fluctuations in superconducting nanowires. https://doi.org/10.1002/prop.201600043

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