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The exit-time problem for a Markov jump process

Journal Article · · European Physical Journal. A
 [1];  [2];  [2]
  1. Gonzaga Univ., Spokane, WA (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
The purpose of our paper is to consider the exit-time problem for a finite-range Markov jump process, i.e, the distance the particle can jump is bounded independent of its location. Such jump diffusions are expedient models for anomalous transport exhibiting super-diffusion or nonstandard normal diffusion. We refer to the associated deterministic equation as a volume-constrained nonlocal diffusion equation. The volume constraint is the nonlocal analogue of a boundary condition necessary to demonstrate that the nonlocal diffusion equation is well-posed and is consistent with the jump process. A critical aspect of the analysis is a variational formulation and a recently developed nonlocal vector calculus. Furthermore, this calculus allows us to pose nonlocal backward and forward Kolmogorov equations, the former equation granting the various moments of the exit-time distribution.
Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
DOE Contract Number:
AC04-94AL85000
OSTI ID:
1235248
Report Number(s):
SAND2015--0850J; 563489
Journal Information:
European Physical Journal. A, Journal Name: European Physical Journal. A Vol. 223; ISSN 1434-6001
Publisher:
Springer
Country of Publication:
United States
Language:
English

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