The XY-model on a Pseudo-sphere: A Renormalization Group Analysis
Modern Physics Letters B [Condensed Matter Physics; Statistical Physics and Applied Physics], 4, (20), .
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We present some simple arguments to indicate that the XY model defined on a space of constant negative curvature is disordered at all non-zero finite temperatures. This corroborates a result which Wilczek and Callan arrived at recently.
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