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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24 Scopus citations

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 interspecies 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.

Original languageEnglish (US)
Article number033619
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume78
Issue number3
DOIs
StatePublished - Sep 26 2008

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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