The critical phenomena of the one-dimensional quantum Ashkin–Teller chain are discussed by using the numerical calculation in the quantum conformal field theory. The result shows that there exists a new critical region of the model.

Communications in Theoretical PhysicsSep 15, 19991 citation

Physica A Statistical Mechanics and its Applications

New effective field theory for the Ashkin–Teller model

J.P. Santos, F. C. Sá Barreto

Published Nov 25, 2014• 22 citations

Publisher

DOI: 10.1016/j.physa.2014.11.043

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{\mathrm{PO}}_{1}

that appears in spin-1/2 ATM, this model presents a new partially ordered phase

{\mathrm{PO}}_{2}

. The anisotropy parameter introduces a first-order phase transition between different phases. However, the model exhibits a rich variety of phase diagrams and higher-order critical points.