Rejuvenation in the Random Energy Model
Marta Sales, Jean-Philippe Bouchaud
Abstract
We show that the Random Energy Model has interesting rejuvenation properties in its frozen phase. Different `susceptibilities' to temperature changes, for the free-energy and for other (`magnetic') observables, can be computed exactly. These susceptibilities diverge at the transition temperature, as (1-T/Tc)-3 for the free-energy.
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