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Title: Escape rate and diffusion of a Stochastically Driven particle
Authors: Piscitelli, Antonio
Pica Ciamarra, Massimo
Keywords: Statistical physics
Nonlinear phenomena
Issue Date: 2017
Source: Piscitelli, A., & Pica Ciamarra, M. (2017). Escape rate and diffusion of a Stochastically Driven particle. Scientific Reports, 7, 41442-.
Series/Report no.: Scientific Reports
Abstract: The dynamical properties of a tracer repeatedly colliding with heat bath particles can be described within a Langevin framework provided that the tracer is more massive than the bath particles, and that the collisions are frequent. Here we consider the escape of a particle from a potential well, and the diffusion coefficient in a periodic potential, without making these assumptions. We have thus investigated the dynamical properties of a Stochastically Driven particle that moves under the influence of the confining potential in between successive collisions with the heat bath. In the overdamped limit, both the escape rate and the diffusion coefficient coincide with those of a Langevin particle. Conversely, in the underdamped limit the two dynamics have a different temperature dependence. In particular, at low temperature the Stochastically Driven particle has a smaller escape rate, but a larger diffusion coefficient.
ISSN: 2045-2322
DOI: 10.1038/srep41442
Schools: School of Physical and Mathematical Sciences 
Rights: © 2017 The Author(s) (Nature Publishing Group). This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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