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Motion of Lee-Yang zeros - MaRDI portal

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Motion of Lee-Yang zeros

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Publication:6406655

DOI10.1007/S10955-023-03066-XarXiv2208.00917MaRDI QIDQ6406655

Author name not available (Why is that?)

Publication date: 1 August 2022

Abstract: We consider the zeros of the partition function of the Ising model with ferromagnetic pair interactions and complex external field. Under the assumption that the graph with strictly positive interactions is connected, we vary the interaction (denoted by t) at a fixed edge. It is already known that each zero is monotonic (either increasing or decreasing) in t; we prove that its motion is local: the entire trajectories of any two distinct zeros are disjoint. If the underlying graph is a complete graph and all interactions take the same value tgeq0 (i.e., the Curie-Weiss model), we prove that all the principal zeros (those in i[0,pi/2)) decrease strictly in t.





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