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## Heisenberg model (quantum)The ## Additional recommended knowledgeFor quantum mechanical reasons (see exchange interaction), the dominant coupling between two dipoles may cause nearest-neighbors to have lowest energy when they are aligned. Under this assumption (so that magnetic interactions only occur between adjacent dipoles) the Hamiltonian can be written in the form for a 1-dimensional model consisting of where the The Hamiltonian then acts upon the tensor product , of dimension 2 The physics of the Heisenberg model strongly depends on the sign of the coupling constant
## See also## References- R.J. Baxter,
*Exactly solved models in statistical mechanics*, London, Academic Press, 1982
Categories: Statistical mechanics | Lattice models |

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Heisenberg_model_(quantum)". A list of authors is available in Wikipedia. |