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Gutzwiller study of extended Hubbard models with fixed boson densities | | Takashi Kimura
; | | Date: |
16 Mar 2011 | | Abstract: | We studied all possible ground states, including supersolid (SS) phases and
phase separations of hard-core and soft-core extended Bose--Hubbard models with
fixed boson densities by using the Gutzwiller variational wave function. We
found that the phase diagram of the soft-core model strongly depends on its
transfer integral. Furthermore, for a large transfer integral, we showed that a
SS phase can be the ground state even below half filling. Finally, we found
that the density difference between nearest-neighbor sites, which shows the
density order of the SS phase, strongly depends on the boson density,
especially for a small transfer integral. | | Source: | arXiv, 1103.3106 | | Services: | Forum | Review | PDF | Favorites | |
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