Nonconcave entropies from generalized canonical ensembles

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dc.creatorCosteniuc, Marius
dc.creatorEllis, Richard S.
dc.creatorTouchette, Hugo
dc.date2006-05-09
dc.date.accessioned2026-07-07T07:08:50Z
dc.date.available2026-07-07T07:08:50Z
dc.descriptionIt 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 which 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.
dc.description5 pages, RevTeX4, 3 figures (best viewed in ps)
dc.identifierhttps://arxiv.org/abs/cond-mat/0605213
dc.identifierhttp://arxiv.org/abs/cond-mat/0605213
dc.identifierPhys. Rev. E 74, 010105(R), 2006.
dc.identifierdoi:10.1103/PhysRevE.74.010105
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/110855
dc.subjectStatistical Mechanics
dc.titleNonconcave entropies from generalized canonical ensembles
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