Gutzwiller projection for bosons
1991; American Physical Society; Volume: 44; Issue: 18 Linguagem: Inglês
10.1103/physrevb.44.10328
ISSN1095-3795
AutoresDaniel S. Rokhsar, B. G. Kotliar,
Tópico(s)Physics of Superconductivity and Magnetism
ResumoWe apply Gutzwiller's variational method to the interacting Bose lattice gas. In contrast with the Fermi case, the Gutzwiller wave function for bosons can be treated with no further approximation in several limits. Furthermore, this wave function can be shown to be exact for large dimensionality, and also in arbitrary dimension for suitably chosen short-range interactions. At densities commensurate with the lattice, a superfluid-insulator transition is found. These results are compared with the fermionic case, and are applied to several interacting-boson systems.
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