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arXiv · 0711.4635

Superfluid and Mott Insulator phases of one-dimensional Bose-Fermi mixtures

A. Zujev·A. Baldwin·R. T. Scalettar·V. G. Rousseau·P. J. H. Denteneer·M. Rigol
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Abstract

We study the ground state phases of Bose-Fermi mixtures in one-dimensional optical lattices with quantum Monte Carlo simulations using the Canonical Worm algorithm. Depending on the filling of bosons and fermions, and the on-site intra- and inter-species interaction, different kinds of incompressible and superfluid phases appear. On the compressible side, correlations between bosons and fermions can lead to a distinctive behavior of the bosonic superfluid density and the fermionic stiffness, as well as of the equal-time Green functions, which allow one to identify regions where the two species exhibit anticorrelated flow. We present here complete phase diagrams for these systems at different fillings and as a function of the interaction parameters.

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A. Zujev, A. Baldwin, R. T. Scalettar, V. G. Rousseau, P. J. H. Denteneer, M. Rigol. 2008-09-27. Superfluid and Mott Insulator phases of one-dimensional Bose-Fermi mixtures. https://doi.org/10.1103/physreva.78.033619

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