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.

Graphic Abstract

中文翻译：

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由方波周期力驱动的正弦势中的随机共振和自由振荡

摘要

最近，通过实验验证了由正弦力和高斯白噪声驱动的正弦势中的随机共振的发生。在这项工作中，我们通过实验表明，当受到方波周期性力驱动时，也可以观察到正弦势中的随机共振。随机共振的发生可以解释为是由于两个动态状态的出现，类似于在大频率下由正弦力驱动时的状态。但是，在方波驱动器的较小频率下，可以观察到输出的自由但有阻尼的振荡，并且可以测量有效指数阻尼系数。

图形摘要