Strongly correlated Fermi-Bose mixtures in disordered optical lattices
release_eel6erauazc4beadqjv544ec6a
by
L. Sanchez-Palencia, V. Ahufinger, A. Kantian, Jakub
Zakrzewski, A. Sanpera, M. Lewenstein
2005
Abstract
We investigate theoretically the low-temperature physics of a two-component
ultracold mixture of bosons and fermions in disordered optical lattices. We
focus on the strongly correlated regime. We show that, under specific
conditions, composite fermions, made of one fermion plus one bosonic hole,
form. The composite picture is used to derive an effective Hamiltonian whose
parameters can be controlled via the boson-boson and the boson-fermion
interactions, the tunneling terms and the inhomogeneities. We finally
investigate the quantum phase diagram of the composite fermions and we show
that it corresponds to the formation of Fermi glasses, spin glasses, and
quantum percolation regimes.
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