Dybiec Bartłomiej, Gudowska-Nowak Ewa
Marian Smoluchowski Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland.
Phys Rev E Stat Nonlin Soft Matter Phys. 2004 Jan;69(1 Pt 2):016105. doi: 10.1103/PhysRevE.69.016105. Epub 2004 Jan 22.
We study the generic problem of the escape of a classical particle over a fluctuating barrier under the influence of non-Gaussian noise mimicking the effects of nonequilibrated bath. The model system is described by a Langevin equation with two independent noise sources, one of which stands for the dichotomous process and the other describes external driving by alpha-stable noise. Our attention focuses on the effect of the structure of stable noises on the mean escape time and on the phenomenon of resonant activation. Possible physical interpretation of the occurrence of Lévy noises and the relevance of the model for chemical kinetics is briefly discussed.
我们研究了在模拟非平衡浴效应的非高斯噪声影响下，经典粒子越过起伏势垒的逃逸这一一般问题。该模型系统由一个带有两个独立噪声源的朗之万方程描述，其中一个代表二分过程，另一个描述由α稳定噪声引起的外部驱动。我们的注意力集中在稳定噪声的结构对平均逃逸时间和共振激活现象的影响上。简要讨论了 Lévy 噪声出现的可能物理解释以及该模型与化学动力学的相关性。
