Publication Date

2006

Journal or Book Title

PHYSICAL REVIEW E

Abstract

It is well known that the entropy of the microcanonical ensemble cannot be calculated as the Legendre transform of the canonical free energy when the entropy is nonconcave. To circumvent this problem, a generalization of the canonical ensemble that allows for the calculation of nonconcave entropies was recently proposed. Here, we study the mean-field Curie-Weiss-Potts spin model and show, by direct calculations, that the nonconcave entropy of this model can be obtained by using a specific instance of the generalized canonical ensemble known as the Gaussian ensemble.

Comments

This is the pre-published version harvested from ArXiv. The published version is located at http://pre.aps.org/abstract/PRE/v74/i1/e010105

Pages

-

Volume

74

Issue

1

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