Stochastic resonance and free oscillation in a sinusoidal potentials driven by a square-wave periodic force

Abstract

Recently, the occurrence of stochastic resonance in a sinusoidal potential driven by a sinusoidal force and a Gaussian white noise was experimentally verified. In this work, we experimentally show that stochastic resonance in sinusoidal potentials can also be observed when driven by a square-wave periodic force. The occurrence of stochastic resonance could be explained as due to the appearance of two dynamical states similar to what was done when driven by a sinusoidal force at large frequencies. However, at smaller frequencies of the square-wave drive, the free but damped oscillations of the output could be observed and the effective exponential damping coefficients measured.