The dynamic ${\Phi }_3^4$ model comes down from infinity

Abstract

We prove an a priori bound for the dynamic ${\Phi }_3^4$ model on the torus wich is independent of the initial condition. In particular, this bound rules out the possibility of finite time blow-up of the solution. It also gives a uniform control over solutions at large times, and thus allows to construct invariant measures via the Krylov-Bogoliubov method. It thereby provides a new dynamic construction of the Euclidean ${\Phi }_3^4$ field theory on finite volume. Our method is based on the local-in-time solution theory developed recently by Gubinelli, Imkeller, Perkowski and Catellier, Chouk. The argument relies entirely on deterministic PDE arguments (such as embeddings of Besov spaces and interpolation), which are combined to derive energy inequalities.

69 pages, final version

References in corpus (2)

• KPZ reloaded
• Rough differential equations driven by signals in Besov spaces

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