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Route to supersolidity for the extended Bose-Hubbard model
We use the Gutzwiller ansatz and analyze the phase diagram of the extended Bose-Hubbard Hamiltonian with on-site (U) and nearest-neighbor (V ) repulsions. For d-dimensional hypercubic lattices, when 2dV < U, it is well known that the ground state alternates between the charge-density-wave (CDW) and
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