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Probability and Combinatorics

Tuesday, April 1, 2025 - 3:30pm

Frederik Klausen

Princeton University

Location

University of Pennsylvania

DRL 4C8

Much of the recent rigorous progress on the classical Ising model was driven by a new detailed understanding of its stochastic geometric representations. The extent of couplings between the Ising model and its FK, random current and high-temperature representations is ever-increasing. A framework unifying the relations will be presented, along with some surprising implications including:Percolation of the uniform even graph is not monotone in the domain.Percolation of the high-temperature expansion and single current is not monotone in the parameterAbsence of exponential decay for the random current corresponding to a supercritical Ising model.

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