Stochastic resonance in a superconducting loop with a Josephson junction
1995; American Institute of Physics; Volume: 77; Issue: 6 Linguagem: Inglês
10.1063/1.358720
ISSN1520-8850
AutoresAndrew D. Hibbs, A. Singsaas, E. W. Jacobs, Adi R. Bulsara, J. J. Bekkedahl, Frank Moss,
Tópico(s)Nonlinear Dynamics and Pattern Formation
ResumoA simple superconducting loop with a Josephson junction subject to a time-sinusoidal magnetic flux embedded in a noise background is considered. Cooperative effects, arising from the interplay between the noise and modulation are described; they manifest themselves in the response, measured as an output signal-to-noise ratio. In particular, it is shown that the response displays the stochastic resonance effect, wherein the output signal-to-noise ratio passes through a maximum at a critical value of the noise strength. A simple theory, based on the characterization of the superconducting quantum interference device as a bistable switching element, is seen to yield good qualitative agreement with the experimental results.
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