Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/53731
Type: Artigo de periódico
Title: A semiclassical trace formula for the canonical partition function of one-dimensional systems
Author: Parisio, F
de Aguiar, MAM
Abstract: We present a semiclassical trace formula for the canonical partition function of arbitrary one-dimensional systems. The approximation is obtained via the stationary exponent method applied to the phase-space integration of the density operator in the coherent state representation. The formalism is valid in the low temperature limit, presenting accurate results in this regime. As illustrations we consider a quartic Hamiltonian that cannot be split into kinetic and potential parts, and a system with two local minima. Applications to spin systems are also presented. (c) 2007 Elsevier B.V. All rights reserved.
Subject: semiclassical limit
partition function
tunneling
spin
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/j.physa.2007.02.113
Date Issue: 2007
Appears in Collections:Unicamp - Artigos e Outros Documentos

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