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Homogenization of non-symmetric jump processes

Published online by Cambridge University Press:  05 June 2023

Qiao Huang*
Affiliation:
Huazhong University of Science and Technology
Jinqiao Duan*
Affiliation:
Illinois Institute of Technology
Renming Song*
Affiliation:
University of Illinois at Urbana-Champaign
*
*Postal address: School of Mathematics and Statistics and Center for Mathematical Sciences, Huazhong University of Science and Technology, Wuhan, Hubei 430074, P.R. China. Email address: hq932309@alumni.hust.edu.cn
**Postal address: Department of Applied Mathematics, Illinois Institute of Technology, Chicago, IL 60616, USA. Email address: duan@iit.edu
***Postal address:Department of Mathematics, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. Email address: rsong@illinois.edu

Abstract

We study homogenization for a class of non-symmetric pure jump Feller processes. The jump intensity involves periodic and aperiodic constituents, as well as oscillating and non-oscillating constituents. This means that the noise can come both from the underlying periodic medium and from external environments, and is allowed to have different scales. It turns out that the Feller process converges in distribution, as the scaling parameter goes to zero, to a Lévy process. As special cases of our result, some homogenization problems studied in previous works can be recovered. We also generalize the approach to the homogenization of symmetric stable-like processes with variable order. Moreover, we present some numerical experiments to demonstrate the usage of our homogenization results in the numerical approximation of first exit times.

Information

Type
Original Article
Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of Applied Probability Trust

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