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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/4499
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dc.contributor.authorDhar, Abhishek-
dc.contributor.authorShastry, Sriram B.-
dc.contributor.authorDasgupta, Chandan-
dc.date.accessioned2012-05-22T09:30:05Z-
dc.date.available2012-05-22T09:30:05Z-
dc.date.issued2000-08-
dc.identifier.citationPhysical Review E, 2000, Vol.62, p1592en
dc.identifier.issn1539-3755-
dc.identifier.issn1550-2376 (Online)-
dc.identifier.urihttp://hdl.handle.net/2289/4499-
dc.descriptionRestricted Access. An open-access version is available at arXiv.org (one of the alternative locations)en
dc.description.abstractWe study the equilibrium and dynamical properties of the axial next-nearest-neighbor Ising chain at the multiphase point. An interesting property of the system is the macroscopic degeneracy of the ground state leading to finite zero-temperature entropy. In our equilibrium study we consider the effect of softening the spins. We show that the degeneracy of the ground state is lifted and there is a qualitative change in the low-temperature behavior of the system with a well-defined low-temperature peak of the specific heat that carries the thermodynamic ``weight'' of the ground state entropy. In our study of the dynamical properties, the stochastic Kawasaki dynamics is considered. The Fokker-Planck operator for the process corresponds to a quantum spin Hamiltonian similar to the Heisenberg ferromagnet but with constraints on allowed states. This leads to a number of differences in its properties, which are obtained through exact numerical diagonalization, simulations, and by obtaining various analytic bounds.en
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.relation.urihttp://arxiv.org/abs/cond-mat/0004207en
dc.relation.urihttp://dx.doi.org/10.1103/PhysRevE.62.1592en
dc.relation.urihttp://adsabs.harvard.edu/abs/2000PhRvE..62.1592Den
dc.rights2000 The American Physical Societyen
dc.subjectlattice theory and statisticsen
dc.subjectstochastic processesen
dc.subjectfluctuation phenomenaen
dc.subjectrandom processesen
dc.subjectbrownian motionen
dc.titleEquilibrium and dynamical properties of the axial next-nearest-neighbor Ising chain at the multiphase pointen
dc.typeArticleen
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