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Superstability estimates for anharmonic systems
Authors:G. Benfatto  C. Marchioro  E. Presutti  M. Pulvirenti
Affiliation:(1) Istituto Matematico dell'Università, Rome, Italy;(2) Istituto Nazionale di Fisica Nucleare, Sezione di Roma, Rome, Italy;(3) Dipartimento di Matematica, Libera Università di Trento, Trento, Italy
Abstract:We consider an anharmonic crystal described by variablesSx,xisinZopfd,SxisinRopf, with one-body interaction sim¦Sx¦agr and nearest neighbor (n.n.) two body interaction sim¦Sx–Sy¦beta. We prove that, for Lambdasub Zopfd bounded, Delta sub Lambda, wherergrLambda is the correlation function for the free boundary condition Gibbs state in Lambda,gamma>0 anddelta are suitable constants independent of Lambda and Delta. This generalizes previous results obtained in the caseagrgebeta.Research partially supported by Consiglio Nazionale delle Ricerche.
Keywords:Statistical mechanics  anharmonic crystal  probability estimates for correlation functions  DLR processes
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