Lebowitz Inequalities for Ashkin-Teller Systems
classification
❄️ cond-mat.stat-mech
keywords
ashkin-tellerlebowitzconsidercouplingdivergentestablishextensionferromagnetic
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We consider the Ashkin-Teller model with negative four-spin coupling but still in the region where the ground state is ferromagnetic. We establish the standard Lebowitz inequality as well as the extension that is necessary to prove a divergent susceptibility.
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