Diffusive thermal dynamics for the Ising ferromagnet
Anno: 2002
Autori: Buonsante P., Burioni R., Cassi D., Vezzani A.
Affiliazione autori: Dipartimento di Fisica and INFM – Università degli Studi di Parma, Italy; Dipartimento di Fisica, Politecnico di Torino; Italy
Abstract: We introduce a thermal dynamics for the Ising ferromagnet where the energy variations occurring within the system exhibit a diffusive character typical of thermalizing agents such as, e.g., localized excitations. Time evolution is provided by a walker hopping across the sites of the underlying lattice according to local probabilities depending on the usual Boltzmann weight at a given temperature. Despite the canonical hopping probabilities the walker drives the system to a stationary state which is not reducible to the canonical equilibrium state in a trivial way. The system still exhibits a magnetic phase transition occurring at a finite value of the temperature larger than the canonical one. The dependence of the model on the density of walkers realizing the dynamics is also discussed. Interestingly the differences between the stationary state and the Boltzmann equilibrium state decrease with increasing number of walkers.
Giornale/Rivista: PHYSICAL REVIEW E
Volume: 66 (3) Da Pagina: 036121-1 A: 036121-8
Parole chiavi: magnetic models; ising model; diffusionDOI: 10.1103/PhysRevE.66.036121Citazioni: 8dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-05-12Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui