Alfonsi L, Gammaitoni L, Santucci S, Bulsara AR
Dipartimento di Fisica, Universita di Perugia, I-06100 Perugia, Italy.
Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics. 2000 Jul;62(1 Pt A):299-302. doi: 10.1103/physreve.62.299.
We show that, for periodically driven noisy underdamped bistable systems, an intrawell stochastic resonance can exist, together with the conventional interwell stochastic resonance, resulting in a double maximum in the power spectral amplitude at the forcing frequency as a function of the noise intensity. The locations of the maxima correspond to matchings of deterministic and stochastic time scales in the system. In this paper we present experimental evidence of these phenomena and a phemonological nonadiabatic description in terms of a noise-controlled nonlinear dynamic resonance.
我们表明，对于周期性驱动的有噪声欠阻尼双稳系统，阱内随机共振可以与传统的阱间随机共振同时存在，这导致在作为噪声强度函数的强迫频率处功率谱幅度出现双最大值。最大值的位置对应于系统中确定性和随机时间尺度的匹配。在本文中，我们给出了这些现象的实验证据，并根据噪声控制的非线性动态共振给出了一个唯象非绝热描述。
