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Physical Review A

One-dimensional density waves of ultracold bosons in an optical lattice (9 pages)

Corinna Kollath, Ulrich Schollwöck

Published Jan 1, 2005• 0 citations
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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.

arXiv:cond-mat/0408269•Physical Review A•Sep 13, 2005•19 citations