Multiplicity of algebraic order from fixed lines of potential surfaces: XY-Ashkin-Teller in spatial dimension d=2
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A position-space renormalization-group study is done for the Ashkin-Tellerized XY model, as an exact solution on the d=2 hierarchical lattice and an approximate solution on the square lattice. A multiplicity of algebraic order is found in the phase diagram, in... ...
