2000 character limit reached
Extended Bose-Hubbard model with pair hopping on the triangular lattice (1302.1376v1)
Published 6 Feb 2013 in cond-mat.quant-gas
Abstract: We study systematically an extended Bose-Hubbard model on the triangular lattice by means of a meanfield method based on the Gutzwiller ansatz. Pair hopping terms are explicitly included and a three-body constraint is applied. The ground-state phase diagram and a variety of quantum phase transitions are investigated in great detail. In particular, we show the existence and stability of the pair supersolid phase.
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