Mantegna RN, Spagnolo B
Istituto Nazionale per la Fisica della Materia, Unita di Palermo, and Dipartimento di Energetica ed Applicazioni di Fisica, Universita di Palermo, Viale delle Scienze, I-90128, Palermo, Italy.
Phys Rev Lett. 2000 Apr 3;84(14):3025-8. doi: 10.1103/PhysRevLett.84.3025.
We experimentally investigate the escape from a metastable state over a fluctuating barrier of a physical system. The system is switching between two states under electronic control of a dichotomous noise. We measure the escape time and its probability density function as a function of the correlation rate of the dichotomous noise in a frequency interval spanning more than four frequency decades. We observe resonant activation, namely a minimum of the average escape time as a function of the correlation rate. We detect two regimes in the study of the shape of the escape time probability distribution: (i) a regime of exponential and (ii) a regime of nonexponential probability distribution.
我们通过实验研究了物理系统在波动势垒上从亚稳态逃逸的过程。该系统在二分噪声的电子控制下在两个状态之间切换。我们在跨越四个以上频率 decade 的频率区间内，测量了逃逸时间及其概率密度函数作为二分噪声相关率的函数。我们观察到共振激活，即平均逃逸时间作为相关率的函数存在最小值。在逃逸时间概率分布形状的研究中，我们检测到两种情况：(i) 指数情况和 (ii) 非指数概率分布情况。
