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journal article

A scaling limit of the parabolic Anderson model with exclusion interaction

Erhard, Dirk
•
Hairer, Martin  
September 10, 2023
COMMUNICATIONS ON PURE AND APPLIED MATHEMATICS

We consider the (discrete) parabolic Anderson model partial derivative u(t,x)/partial derivative t = Delta u(t,x) +xi t (x)u(t,x), t >= 0, x is an element of Z(d), where the xi-field is R-valued and plays the role of a dynamic random environment, and. is the discrete Laplacian. We focus on the case in which xi is given by a properly rescaled symmetric simple exclusion process under which it converges to an Ornstein-Uhlenbeck process. Scaling the Laplacian diffusively and restricting ourselves to a torus, we show that in dimension d = 3 upon considering a suitably renormalised version of the above equation, the sequence of solutions converges in law. As a by-product of our main result we obtain precise asymptotics for the survival probability of a simple random walk that is killed at a scale dependent rate when meeting an exclusion particle. Our proof relies on the discrete theory of regularity structures of Erhard and Hairer and on novel sharp estimates of joint cumulants of arbitrary large order for the exclusion process. We think that the latter is of independent interest and may find applications elsewhere.

  • Details
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Type
journal article
DOI
10.1002/cpa.22145
Web of Science ID

WOS:001061940800001

Author(s)
Erhard, Dirk
Hairer, Martin  
Date Issued

2023-09-10

Publisher

WILEY

Published in
COMMUNICATIONS ON PURE AND APPLIED MATHEMATICS
Volume

77

Issue

2

Start page

1065

End page

1125

Subjects

BROWNIAN-MOTION

•

CONFINEMENT

•

ASYMPTOTICS

•

Science & Technology

•

Physical Sciences

Editorial or Peer reviewed

REVIEWED

Written at

OTHER

EPFL units
PROPDE  
FunderFunding(s)Grant NumberGrant URL

National Council for Scientific and Technological Development

303520/2019-1, 409259/2018-7

Royal Society

Serrapilheira Institute

R-2011-37582

Available on Infoscience
September 17, 2024
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/241194
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