We introduce a new variational approach to the stationary state of kinetic Ising-like models. The approach is based on the cluster expansion of the entropy term appearing in a functional which is minimized by the system history. We rederive a known mean-field theory and propose a new method, here called diamond approximation, which turns out to be more accurate and faster than other methods of comparable computational complexity.
|Titolo:||Variational approximations for stationary states of Ising-like models|
|Data di pubblicazione:||2013|
|Digital Object Identifier (DOI):||10.1140/epjb/e2013-40031-6|
|Appare nelle tipologie:||1.1 Articolo in rivista|