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Relation between the geometry of sign clusters of the 2D GFF and its Wick powers

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SSDW03 - Geometry, occupation fields, and scaling limits

In 1990 Le Gall showed an asymptotic expansion of the epsilon-neighborhood of a planar Brownian trajectory (Wiener sausage) into powers of 1/|log eps|, that involves the renormalized self-intersection local times. In my talk I will present an analogue of this in the case of the 2D GFF . In the latter case, there is an asymptotic expansion of the epsilon-neighborhood of a sign cluster of the 2D GFF into half-integer powers of 1/|log eps|, with the coefficients of the expansion being related to the renormalized (Wick) powers of the GFF .

This talk is part of the Isaac Newton Institute Seminar Series series.

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