Transformacao De Dyson
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1. Sobre a teoria das ondas de spin / On the theory of Spin waves
The mathematical formalismo f the spin wave theory is analysed. The thermodynamical equivalence between the Dyson-Malleev and Holstein-Primakoff transformations is proved. The problems involving the kinematical interaction are also discussed in detail. A new splitting of the Heisenberg Hamiltonian, perfomed in configuration space, is used to study the spin w
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/11/1984