Regularization by random translation of potentials for the continuous PAM and related models in arbitrary dimension
Abstract
We study a regularization by noise phenomenon for the continuous parabolic Anderson model with a potential shifted along paths of fractional Brownian motion. We demonstrate that provided the Hurst parameter is chosen sufficiently small, this shift allows to establish well-posedness and stability to the corresponding problem - without the need of renormalization - in any dimension. We moreover provide a robustified Feynman-Kac type formula for the unique solution to the regularized problem building upon regularity estimates for the local time of fractional Brownian motion as well as non-linear Young integration.
- Publication:
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arXiv e-prints
- Pub Date:
- May 2022
- DOI:
- arXiv:
- arXiv:2205.04789
- Bibcode:
- 2022arXiv220504789B
- Keywords:
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- Mathematics - Probability