The full extremal process of the discrete Gaussian free field in 2D

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• Oren Louidor (Technion)
• Tuesday 02 June 2015, 16:30-17:30
• MR12, CMS, Wilberforce Road, Cambridge, CB3 0WB.

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We show the existence of the limit of the full extremal process of the discrete Gaussian free field in 2D with zero boundary conditions. The limit is a clustered Poisson point process with a random intensity measure, which is conjecturally related to the critical Liouville quantum gravity measure w.r.t. the continuous Gaussian free field. Several corollaries follow directly, e.g. a natural construction for the super-critical Gaussian multiplicative chaos and Poisson-Dirichlet statistics for the limiting Gibbs measure – both w.r.t. the CGFF . The proof is based on a novel concentric decomposition of the DGFF which effectively reduces the problem to that of finding asymptotics for the probability of a decorated non-homogenous random-walk required to stay positive. Entropic repulsion plays a key role in the analysis. Joint work with M. Biskup (UCLA)

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