Lifetime of the superconductive state in short and long Josephson junctions

Bernardo Spagnolo, Davide Valenti, Pankratov, Giuseppe Augello

Risultato della ricerca: Article

20 Citazioni (Scopus)

Abstract

We study the transient statistical properties of short and long Josephson junctions under the influence of thermal and correlated fluctuations. In particular, we investigate the lifetime of the superconductive metastable state finding the presence of noise induced phenomena. For short Josephson junctions we investigate the lifetime as a function both of the frequency of the current driving signal and the noise intensity and we find how these noise-induced effects are modified by the presence of a correlated noise source. For long Josephson junctions we integrate numerically the sine-Gordon equation calculating the lifetime as a function of the length of the junction both for inhomogeneous and homogeneous bias current distributions. We obtain a non-monotonic behavior of the lifetime as a function of the frequency of the current driving signal and the correlation time of the noise. Moreover we find two maxima in the non-monotonic behaviour of the mean escape time as a function of the correlated noise intensity.
Lingua originaleEnglish
pagine (da-a)145-151
Numero di pagine7
RivistaTHE EUROPEAN PHYSICAL JOURNAL. B, CONDENSED MATTER PHYSICS
Volume70
Stato di pubblicazionePublished - 2009

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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