Application of large deviation theory to the mean-field phi4-model
Abstract
A large deviation technique is used to calculate the microcanonical entropy function s(v,m) of the mean-field phi4-model as a function of the potential energy v and the magnetization m. As in the canonical ensemble, a continuous phase transition is found. An analytical expression is obtained for the critical energy vc(J) as a function of the coupling parameter J.
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