# Classical XY model

## Lattice model of statistical mechanics / From Wikipedia, the free encyclopedia

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The **classical XY model** (sometimes also called **classical rotor** (**rotator**) **model** or **O(2) model**) is a lattice model of statistical mechanics. In general, the XY model can be seen as a specialization of Stanley's *n*-vector model[1] for *n* = 2.