Stretched Exponential Relaxation in the Biased Random Voter Model
Jan Naudts, Frank Redig, Stefan Van Gulck
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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