August 2021 Asymptotics of PDE in random environment by paracontrolled calculus
Tadahisa Funaki, Masato Hoshino, Sunder Sethuraman, Bin Xie
Author Affiliations +
Ann. Inst. H. Poincaré Probab. Statist. 57(3): 1702-1735 (August 2021). DOI: 10.1214/20-AIHP1129

Abstract

We apply the paracontrolled calculus to study the asymptotic behavior of a certain quasilinear PDE with smeared mild noise, which originally appears as the space-time scaling limit of a particle system in random environment on one dimensional discrete lattice. We establish the convergence result and show a local in time well-posedness of the limit stochastic PDE with spatial white noise. It turns out that our limit stochastic PDE does not require any renormalization. We also show a comparison theorem for the limit equation.

Nous utilisons le calcul paracontrôlé pour étudier le comportement asymptotique de certaines EDP quasi-linéaires avec bruit régularisé, qui sont apparues initialement comme limites d’échelle spatio-temporelles de systèmes de particules en environnement aléatoire sur le réseau discret un-dimensionnel. Nous établissons un résultat de convergence et montrons que l’EDP stochastique limite est bien posée localement en temps avec un bruit blanc en espace. Il apparaît que notre EDP stochastique limite ne nécessite pas de renormalisation. Nous donnons aussi un théorème de comparaison pour l’équation limite.

Acknowledgements

T. Funaki was supported in part by JSPS KAKENHI, Grant-in-Aid for Scientific Researches (A) 18H03672 and (S) 16H06338. M. Hoshino was supported in part by JSPS KAKENHI, Early-Career Scientists 19K14556. S. Sethuraman was supported by grant ARO W911NF-181-0311, a Simons Foundation Sabbatical grant, and by a Japan Society for the Promotion of Science Fellowship. B. Xie was supported in part by JSPS KAKENHI, Grant-in-Aid for Scientific Research (C) 16K05197 and (C) 20K03627.

Citation

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Tadahisa Funaki. Masato Hoshino. Sunder Sethuraman. Bin Xie. "Asymptotics of PDE in random environment by paracontrolled calculus." Ann. Inst. H. Poincaré Probab. Statist. 57 (3) 1702 - 1735, August 2021. https://doi.org/10.1214/20-AIHP1129

Information

Received: 7 May 2020; Revised: 20 October 2020; Accepted: 13 November 2020; Published: August 2021
First available in Project Euclid: 22 July 2021

MathSciNet: MR4291459
zbMATH: 1484.60066
Digital Object Identifier: 10.1214/20-AIHP1129

Subjects:
Primary: 35R60 , 35S50 , 60H15

Keywords: Paracontrolled calculus , PDE in random environment , Quasilinear stochastic PDE

Rights: Copyright © 2021 Association des Publications de l’Institut Henri Poincaré

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Vol.57 • No. 3 • August 2021
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