We perform a rigorous computation of the specific heat of the Ashkin-Teller model in the case of small interaction and we explain how the universality-nonuniversality crossover is realized when the isotropic limit is reached. We prove that, even in the region where universality for the specific heat holds, anomalous critical exponents appear: for instance, we predict the existence of a previously unknown anomalous exponent, continuously varying with the strength of the interaction, describing how the difference between the critical temperatures rescales with the anisotropy parameter.

GIULIANI A, & MASTROPIETRO V (2004). Anomalous critical exponents in the anisotropic Ashkin-Teller model. PHYSICAL REVIEW LETTERS, 93, 190603.

Anomalous critical exponents in the anisotropic Ashkin-Teller model

GIULIANI, ALESSANDRO;
2004

Abstract

We perform a rigorous computation of the specific heat of the Ashkin-Teller model in the case of small interaction and we explain how the universality-nonuniversality crossover is realized when the isotropic limit is reached. We prove that, even in the region where universality for the specific heat holds, anomalous critical exponents appear: for instance, we predict the existence of a previously unknown anomalous exponent, continuously varying with the strength of the interaction, describing how the difference between the critical temperatures rescales with the anisotropy parameter.
GIULIANI A, & MASTROPIETRO V (2004). Anomalous critical exponents in the anisotropic Ashkin-Teller model. PHYSICAL REVIEW LETTERS, 93, 190603.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11590/143429
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