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Holstein model and Peierls instability in 1D boson-fermion lattice gases

E. Pazy·A. Vardi
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Abstract

We study an ultracold bose-fermi 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 wavenumber of twice the Fermi wavenumber will appear in the quasi one-dimensional system.

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E. Pazy, A. Vardi. 2004-08-12. Holstein model and Peierls instability in 1D boson-fermion lattice gases. https://doi.org/10.1103/physreva.72.033609

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