Studying Avalanches in the ground-state of the two-dimensional random field Ising model driven by an external field


Autoria(s): Frontera Beccaria, Carlos; Vives i Santa-Eulàlia, Eduard
Contribuinte(s)

Universitat de Barcelona

Data(s)

26/07/2011

Resumo

We study the exact ground state of the two-dimensional random-field Ising model as a function of both the external applied field B and the standard deviation ¿ of the Gaussian random-field distribution. The equilibrium evolution of the magnetization consists in a sequence of discrete jumps. These are very similar to the avalanche behavior found in the out-of-equilibrium version of the same model with local relaxation dynamics. We compare the statistical distributions of magnetization jumps and find that both exhibit power-law behavior for the same value of ¿. The corresponding exponents are compared.

Identificador

http://hdl.handle.net/2445/18735

Idioma(s)

eng

Publicador

The American Physical Society

Direitos

(c) The American Physical Society, 2000

Palavras-Chave #Física estadística #Termodinàmica #Sistemes dinàmics diferenciables #Equacions d'estat #Transformacions de fase (Física estadística) #Statistical physics #Thermodynamics #Differentiable dynamical systems #Equations of state #Phase transformations (Statistical physics)
Tipo

info:eu-repo/semantics/article