Phase diagram of bosonic hard rods in a one-dimensional optical lattice

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American Physical Society
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We calculated the phase diagram of a pure one-dimensional system of hard-rod bosons when it is loaded in optical lattices of different depths by means of a diffusion Monte Carlo technique. The results were compared with those for a Bose-Hubbard model for the same range of densities and characteristic parameters. Both diagrams were found to be qualitatively similar in the regime in which a one-band Hubbard model is adequate, that comparison being poorer when this condition is not fulfilled.
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Physical Review A - Atomic, Molecular, and Optical Physics, 2012;85(1)
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