Persistence and the random bond Ising model in two dimensions.
Phys Rev E Stat Nonlin Soft Matter Phys
; 73(2 Pt 2): 025701, 2006 Feb.
Article
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| MEDLINE
| ID: mdl-16605391
ABSTRACT
We study the zero-temperature persistence phenomenon in the random bond +/-J Ising model on a square lattice via extensive numerical simulations. We find strong evidence for "blocking" regardless of the amount disorder present in the system. The fraction of spins which never flips displays interesting nonmonotonic, double-humped behavior as the concentration of ferromagnetic bonds is varied from zero to one. The peak is identified with the onset of the zero-temperature spin glass transition in the model. The residual persistence is found to decay algebraically and the persistence exponent theta(p) approximately = 0.9 over the range 0.1< or =p< or =0.9. Our results are completely consistent with the result of Gandolfi, Newman, and Stein for infinite systems that this model has "mixed" behavior, namely positive fractions of spins that flip finitely and infinitely often, respectively. [Gandolfi, Newman and Stein, Commun. Math. Phys. 214, 373 (2000).].
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Colección:
01-internacional
Base de datos:
MEDLINE
Tipo de estudio:
Clinical_trials
Idioma:
En
Revista:
Phys Rev E Stat Nonlin Soft Matter Phys
Asunto de la revista:
BIOFISICA
/
FISIOLOGIA
Año:
2006
Tipo del documento:
Article
País de afiliación:
Reino Unido