Żbik Bartosz, Dybiec Bartłomiej
Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, Łojasiewicza 11, 30-348 Kraków, Poland.
Institute of Theoretical Physics and Mark Kac Center for Complex Systems Research, Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, Łojasiewicza 11, 30-348 Kraków, Poland.
Phys Rev E. 2024 Apr;109(4-1):044147. doi: 10.1103/PhysRevE.109.044147.
Stochastic resetting is a protocol of starting anew, which can be used to facilitate the escape kinetics. We demonstrate that restarting can accelerate the escape kinetics from a finite interval restricted by two absorbing boundaries also in the presence of heavy-tailed, Lévy-type, α-stable noise. However, the width of the domain where resetting is beneficial depends on the value of the stability index α determining the power-law decay of the jump length distribution. For heavier (smaller α) distributions, the domain becomes narrower in comparison to lighter tails. Additionally, we explore connections between Lévy flights (LFs) and Lévy walks (LWs) in the presence of stochastic resetting. First of all, we show that for Lévy walks, the stochastic resetting can also be beneficial in the domain where the coefficient of variation is smaller than 1. Moreover, we demonstrate that in the domain where LWs are characterized by a finite mean jump duration (length), with the increasing width of the interval, the LWs start to share similarities with LFs under stochastic resetting.
随机重置是一种重新开始的协议,可用于促进逃逸动力学。我们证明,在存在重尾、 Lévy 型、α稳定噪声的情况下,重新启动也可以加速从由两个吸收边界限制的有限区间的逃逸动力学。然而,重置有益的域的宽度取决于确定跳跃长度分布的幂律衰减的稳定性指数α的值。对于更重(更小的α)的分布,与更轻的尾部相比,该域会变窄。此外,我们探讨了在存在随机重置的情况下 Lévy 飞行(LFs)和 Lévy 行走(LWs)之间的联系。首先,我们表明对于 Lévy 行走,随机重置在变异系数小于 1 的域中也可能是有益的。此外,我们证明,在 LWs 具有有限平均跳跃持续时间(长度)的域中,随着区间宽度的增加,LWs 在随机重置下开始与 LFs 有相似之处。