Phys Rev E Stat Nonlin Soft Matter Phys. 2015 Dec;92(6):062104. doi: 10.1103/PhysRevE.92.062104. Epub 2015 Dec 02.

Effective stochastic generators for conditioned dynamics at an atypical reaction-diffusion current.

Physical review. E, Statistical, nonlinear, and soft matter physics

Pegah Torkaman, Farhad H Jafarpour

PMID: 26764629 DOI: 10.1103/PhysRevE.92.062104

Abstract

We consider the fluctuations of a time-integrated particle current around an atypical value in a generic stochastic Markov process involving classical particles with two-site interaction and hard-core repulsion on a finite one-dimensional lattice with open boundaries. We address the question of which interactions one has to impose on such a process to make the atypical value of the current typical. It is known that a corresponding effective stochastic Markov process might exist whose typical current value is equal to the atypical current value in the original process within a time-translational invariant regime. This effective process has, in principle, nonlocal transition rates. Nevertheless, it turns out that under some conditions, the stochastic generator of the effective process has the same dynamical rules as the stochastic generator of the original process. We find these conditions and show that our approach can be generalized to any time-integrated observable.

Publication Types

• Journal Article