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Continuous model for bosonic hard spheres in quasi-one-dimensional optical lattices

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Continuous model for bosonic hard spheres in quasi-one-dimensional optical lattices.pdf (208.8Kb)
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http://hdl.handle.net/10433/983
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Authorship
Gordillo, M.C.Autoridad UPO Orcid Dialnet Scopus; De Soto, Feliciano; Carbonell-Coronado, C.
Palabras clave
Bosonic hard spheres
Optical lattices
Publication date
2013-06
Abstract
By means of diffusion Monte Carlo calculations, we investigated the quantum phase transition between a superfluid and a Mott insulator for a system of hard-sphere bosons in a quasi-one-dimensional optical lattice. For this continuous Hamiltonian, we studied how the stability limits of the Mott phase changed with the optical lattice depth and the transverse confinement width. A comparison of these results to those of a one-dimensional homogeneous Bose-Hubbard model indicates that this last model describes accurately the phase diagram only in the limit of deep lattices. For shallow ones, our results are comparable to those of the sine-Gordon model in its limit of application. We provide an estimate of the critical parameters when none of those models are realistic descriptions of a quasi-one-dimensional optical lattice.
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BIBLIOTECA CRAI  ©  2015 Universidad Pablo de Olavide
Contact Us | Legal warning