Quantum phase slips and voltage fluctuations in superconducting nanowires

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 add...

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Bibliographic Details
Published in:Fortschritte der Physik 2017-06, Vol.65 (6-8), p.n/a
Main Authors: Semenov, Andrew G., Zaikin, Andrei D.
Format: Article
Language:English
Subjects:
Bias
Electric potential
Low frequencies
Nanowires
Noise prediction
Power law
Quantum phase slips
Quantum physics
Shot noise
Statistics
Superconductivity
Wire
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Summary: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 SΩ may depend non‐monotonously on temperature. In the long wire limit SΩ decreases with increasing frequency Ω and vanishes beyond a threshold value of Ω at T→0. Our predictions can be directly tested in future experiments with superconducting nanowires.
ISSN:0015-8208
1521-3978
DOI:10.1002/prop.201600043