The underdamped Josephson junction subjected to colored noises

L. R. Nie and D. C. Mei ()

The European Physical Journal B: Condensed Matter and Complex Systems, 2007, vol. 58, issue 4, 475-481

Abstract: The properties of the underdamped Josephson junction subjected to colored noises were investigated with large and small phase difference (φ). For the case of the large φ, we found numerically that: (i) the probability distribution function of φ exhibits monostability → bistability → monostability transitions as the autocorrelation rate (λ) of a colored noise increases; (ii) in the bistability region the multiplicative noise drives the phase difference to turn over periodically; (iii) the slope K of the linear response of the junction potential difference (〈V 〉) can be somewhat reduced by means of tuning an optimal λ; (iv) the amplitude of φ in response to external sinusoidal signals changes with λ. For the case of small φ, after deriving the analytical expressions of the potential difference amplitude (〈V 〉 max ) and the K in the presence of a dichotomous noise, we found nonmonotonic behavior of 〈V 〉 max and the slope K as a function of λ. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2007

Keywords: 05.40.-a Fluctuation phenomena, random processes, noise, and Brownian motion, 85.25.Cp Josephson devices, 87.15.Aa Theory and modeling; computer simulation, (search for similar items in EconPapers)
Date: 2007
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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DOI: 10.1140/epjb/e2007-00240-2

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