The phenomenon of entropic stochastic resonance (ESR) is investigated with the presence of a time-periodic force in the transverse direction. Simulation results manifest that the ESR can survive even if there is no static bias force in any direction, just if a transverse driving field is applied. In the weak noise region, the transverse driving force leads to a giant-suppression of the escape rate from one well to another, i.e. the entropic trapping. The increase in noise intensity will eliminate this suppression and induce the ESR phenomenon. An alternative quantity, called the mean free flying time, is also proposed to characterize the ESR as well as the conventional spectral power amplification. The ESR can be modulated conveniently by the transverse periodic force, which implies an alternative method for controlling the dynamics of small-scale systems.

This article is part of the theme issue ‘Vibrational and stochastic resonance in driven nonlinear systems (part 2)’.

在横向方向上存在时间周期力的情况下，研究了熵随机共振（ESR）现象。仿真结果表明，即使在任何方向上都没有静态偏压力，即使施加了横向驱动场，ESR都可以幸免。在弱噪声区域，横向驱动力导致从一个井到另一个井的逃逸率的极大抑制，即熵陷。噪声强度的增加将消除这种抑制并引起ESR现象。还提出了一个替代量，称为平均自由飞行时间，以表征ESR以及常规频谱功率放大。通过横向周期性力可以方便地调节ESR，

本文是主题问题“驱动的非线性系统中的振动和随机共振（第2部分）”的一部分。