WIAS Preprint No. 2765, (2020)

Longtime asymptotics of the two-dimensional parabolic Anderson model with white-noise potential



Authors

  • König, Wolfgang
    ORCID: 0000-0002-7673-4364
  • Perkowski, Nicolas
  • van Zuijlen, Willem

2010 Mathematics Subject Classification

  • 60H17 60H25 60L40 82B4 35J10 35P15

Keywords

  • Parabolic Anderson model, Anderson Hamiltonian, white-noise potential, singular SPDE, paracontrolled distribution, regularization in two dimensions, intermittency, almost-sure large-time asymptotics, principal eigenvalue of random Schrödinger operator

DOI

10.20347/WIAS.PREPRINT.2765

Abstract

We consider the parabolic Anderson model (PAM) in ℝ ² with a Gaussian (space) white-noise potential. We prove that the almost-sure large-time asymptotic behaviour of the total mass at time t is given asymptotically by Χ t log t, with the deterministic constant Χ identified in terms of a variational formula. In earlier work of one of the authors this constant was used to describe the asymptotic behaviour principal Dirichlet of the eigenvalue the Anderson operator on the t by t box around zero asymptotically by Χ log t.

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