Nonequilibrium fluctuation-induced phenomena in Josephson junctions
Mark M. Millonas, Dante R. Chialvo
DOI 10.1103/PhysRevE.53.2239 · Physical Review E
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Abstract
We show that nonequilibrium current fluctuations of various types can give rise to net voltages in superconducting tunnel junctions. This is the result of a fluctuation-induced net rate of change of the phase difference of the superconducting order parameter across the junction. Various exact expressions are derived for the mean voltage and are evaluated explicitly in certain limits, as well as by numerical simulations. We show that these phenomena are due to an asymmetry in the spectral properties of the current noise, which should be a fairly ubiquitous feature of nonequilibrium fluctuations in nature. © 1996 The American Physical Society.
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