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Stretched Exponential Relaxation in the Biased Random Voter Model

Jan Naudts, Frank Redig, Stefan Van Gulck

math-pharXiv:math-ph/9903002

Abstract

We study the relaxation properties of the voter model with i.i.d. random bias. We prove under mild condions that the disorder-averaged relaxation of this biased random voter model is faster than a stretched exponential with exponent d/(d+α), where 0<α 2 depends on the transition rates of the non-biased voter model. Under an additional assumption, we show that the above upper bound is optimal. The main ingredient of our proof is a result of Donsker and Varadhan (1979).

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