Holstein model and Peierls instability in one-dimensional boson-fermion lattice gases

E. Pazy, A. Vardi

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Abstract

We study an ultracold Bose-Fermi atomic mixture in a one-dimensional optical lattice. When boson atoms are heavier then fermion atoms the system is described by an adiabatic Holstein model, exhibiting a Peierls instability for commensurate fermion filling factors. A bosonic density wave with a wave number of twice the Fermi wave number will appear in the quasi-one-dimensional system, due to the opening of a gap at the Fermi energy in the fermion spectrum.

Original languageEnglish
Article number033609
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume72
Issue number3
DOIs
StatePublished - 1 Sep 2005

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