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• W2023136855 abstract "We investigate the ground-state phase diagram of the soft-core Bose-Hubbard model with the nearest-neighbor repulsion on a square lattice by using an unbiased quantum Monte Carlo method. In contrast to the previous study[P. Sengupta {it et. al.}, Phys. Rev. Lett. {bf 94}, 207202 (2005)], we present the ground-state phase diagrams up to large hopping parameters. As a result, in addition to the known supersolid above half-filling, we find supersolid even below and at half-filling for large hopping parameters. Furthermore, for the strong nearest-neighbor repulsion, we show that the supersolid phase occupies a remarkably broad region in the phase diagram. The results are in qualitative agreement with that obtained by the Gutzwiller mean-field approximation[M. Iskin, Phys. Rev. A {bf 83}, 051606(R) (2011) and T. Kimura, Phys. Rev. A {bf 84}, 063630 (2011)]." @default.
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• W2023136855 date "2012-08-27" @default.
• W2023136855 modified "2023-10-18" @default.
• W2023136855 title "Ground-state phase diagram of the two-dimensional extended Bose-Hubbard model" @default.
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• W2023136855 doi "https://doi.org/10.1103/physrevb.86.054520" @default.
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