Generalized Dynamical Mean-Field Theory for Bose-Fermi Mixtures in Optical Lattices

Details Generalized Dynamical Mean-Field Theory for Bose-Fermi Mixtures in Optical Lattices Generalized Dynamical Mean-Field Theory for Bose-Fermi Mixtures in Optical Lattices

2008-10-09

arxiv.org/abs/0810.1733v3

Phys. Rev. B 79, 144506 (2008)

Physics

Condensed Matter

Other Condensed Matter

12+ pages 6 figures

Scientific paper

10.1103/PhysRevB.79.144506

We give a detailed discussion of the recently developed Generalized Dynamical Mean-Field Theory (GDMFT) for a mixture of bosonic and fermionic particles. We show that this method is non-perturbative and exact in infinite dimensions and reliably describes the full range from weak to strong coupling. Like in conventional Dynamical Mean-Field Theory, the small parameter is 1/z, where z is the lattice coordination number. We apply the GDMFT scheme to a mixture of spinless fermions and bosons in an optical lattice. We investigate the ossibility of a supersolid phase, focussing on the case of 1/2 filling for the fermions and 3/2 filling for the bosons.

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