XY Model
(Sprache: Englisch)
High Quality Content by WIKIPEDIA articles! Like the famous Ising and Heisenberg models, the XY model is one of the many highly simplified models in statistical mechanics. It is a special case of the n-vector model. In the XY model, 2D classical spins...
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High Quality Content by WIKIPEDIA articles! Like the famous Ising and Heisenberg models, the XY model is one of the many highly simplified models in statistical mechanics. It is a special case of the n-vector model. In the XY model, 2D classical spins mathbf{s}_i are confined to some lattice. The spins are 2D unit vectors that obey O(2) (or U(1)) symmetry, (as they are classical spins). The continuous version of the XY model is often used to model systems that possess order parameters with the same kinds of symmetry, e.g. superfluid helium, hexatic liquid crystals. Topological defects in the XY model leads to a vortex-unbinding transition from the low-temperature phase to the high-temperature disordered phase. In two spatial dimensions the XY model exhibits a Kosterlitz-Thouless transition from the disordered high-temperature phase into the quasi-long range ordered low-temperature phase.
Bibliographische Angaben
- 2010, 100 Seiten, Maße: 15 x 22 cm, Kartoniert (TB), Englisch
- Herausgegeben von Surhone, Lambert M.; Timpledon, Miriam T.; Marseken, Susan F.
- Verlag: Betascript Publishing
- ISBN-10: 6131103658
- ISBN-13: 9786131103650
Sprache:
Englisch
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