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Cluster perturbation theory for spin Hamiltonians

✍ Scribed by A. S. Ovchinnikov; I. G. Bostrem; Vl. E. Sinitsyn

Publisher
SP MAIK Nauka/Interperiodica
Year
2010
Tongue
English
Weight
553 KB
Volume
162
Category
Article
ISSN
0040-5779

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πŸ“œ SIMILAR VOLUMES

Perturbation Theory for a Spin System
Perturbation Theory for a Spin System
✍ S. Trimper πŸ“‚ Article πŸ“… 1973 πŸ› John Wiley and Sons 🌐 English βš– 343 KB

## Abstract The spin 1/2 Heisenberg ferromagnet is treated by perturbation theory. To avoid the difficulties connected with the unusual commutation relations of spin operators the Dyson‐Maleev transformation is applied. The corresponding Bose system is described by the Bose‐Green function. To calcu