The role of soft versus hard bistable systems on stochastic resonance using average cycle energy as a quantifier
Institute of Physics, Sachivalaya Marg, 751005
Bhubaneswar, Orissa, India
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Received in final form: 15 October 2011
Published online: 10 November 2011
Using the input energy per cycle as a quantifier of stochastic resonance (SR), we show that SR is observed in superharmonic (hard) potentials. However, it is not observed in subharmonic (soft) potentials, even though the potential is bistable. These results are consistent with recent observations based on amplitude of average position as a quantifier. In both soft and hard potentials, we observe resonance phenomenon as a function of the driving frequency. The nature of probability distributions of average work are qualitatively different for soft and hard potentials.
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag, 2011