Editing Classical XY model (section)

{{Short description|Lattice model of statistical mechanics}}
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The '''classical XY model''' (sometimes also called '''classical rotor''' ('''rotator''') '''model''' or '''O(2) model''') is a [[lattice model (physics)|lattice model]] of [[statistical mechanics]]. In general, the XY model can be seen as a specialization of Stanley's [[n-vector model|''n''-vector model]]<ref>{{cite journal|last=Stanley|first=H.E.|year=1968|title=Dependence of Critical Properties on Dimensionality of Spins|journal=Physical Review Letters|volume=20|issue=12|pages=589–592|bibcode=1968PhRvL..20..589S|doi=10.1103/PhysRevLett.20.589}}</ref> for {{math|''n'' {{=}} 2}}.