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Ergodicity of 2D singular stochastic Navier–Stokes equations

Martin Hairer and Wenhao Zhao

Vol. 6 (2025), No. 3, 777–818
Abstract

We consider the 2D stochastic Navier–Stokes equations driven by noise that have the regularity of space-time white noise but don’t exactly coincide with it. We show that, provided that the intensity of the noise is sufficiently weak at high frequencies, this system admits uniform bounds in time, so that it has an invariant measure for which we obtain stretched exponential tail bounds.

Keywords
singular SPDEs, ergodicity, stochastic Navier–Stokes
Mathematical Subject Classification
Primary: 60H17
Milestones
Received: 5 November 2024
Revised: 5 February 2025
Accepted: 8 April 2025
Published: 12 May 2025
Authors
Martin Hairer
EPFL
SB Math Propde
Lausanne
Switzerland
Department of Mathematics
Imperial College London
London
United Kingdom
Wenhao Zhao
EPFL
SB Math Propde
Lausanne
Switzerland