English

Can the Stochastic Wave Equation with Strong Drift Hit Zero?

Probability 2019-02-21 v2

Abstract

We study the stochastic wave equation with multiplicative noise and singular drift: tu(t,x)=Δu(t,x)+uα(t,x)+g(u(t,x))W˙(t,x) \partial_tu(t,x)=\Delta u(t,x)+u^{-\alpha}(t,x)+g(u(t,x))\dot{W}(t,x) where xx lies in the circle R/JZ\mathbf{R}/J\mathbf{Z} and u(0,x)>0u(0,x)>0. We show that (i) If 0<α<10<\alpha<1 then with positive probability, u(t,x)=0u(t,x)=0 for some (t,x)(t,x). (ii) If α>3\alpha>3 then with probability one, u(t,x)0u(t,x)\ne0 for all (t,x)(t,x).

Cite

@article{arxiv.1802.09487,
  title  = {Can the Stochastic Wave Equation with Strong Drift Hit Zero?},
  author = {Kevin Lin and Carl Mueller},
  journal= {arXiv preprint arXiv:1802.09487},
  year   = {2019}
}

Comments

35 pages

R2 v1 2026-06-23T00:33:59.088Z