English

Weak universality of $\Phi^4_3$: polynomial potential and general smoothing mechanism

Probability 2020-05-13 v1 Analysis of PDEs

Abstract

We consider a class of stochastic reaction-diffusion equations on the three dimensional torus. The non-linearities are odd polynomials in the weakly non-linear regime, and the smoothing mechanisms are very general higher order perturbations of the Laplacian. The randomness is the space-time white noise without regularisation. We show that these processes converge to the dynamical Φ34(λ)\Phi^4_3 (\lambda) model, where the coupling constant λ\lambda has an explicit expression involving non-trivial interactions between all details of the smoothing mechanism and the non-linearity.

Keywords

Cite

@article{arxiv.2005.05453,
  title  = {Weak universality of $\Phi^4_3$: polynomial potential and general smoothing mechanism},
  author = {Dirk Erhard and Weijun Xu},
  journal= {arXiv preprint arXiv:2005.05453},
  year   = {2020}
}