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Q: Fachverband Quantenoptik und Photonik

Q 24: Quantum Gases: Mixtures and Spinor Gases

Q 24.1: Vortrag

Mittwoch, 10. März 2010, 10:30–10:45, E 001

Bose-Fermi Mixtures in Optical Lattices at Finite Temperature Beyond the One-Band Approximation — •Matthias Ohliger¹, Marcus Cramer², and Jens Eisert¹ — ¹Institute for Physics and Astronomy, University of Potsdam, Potsdam, Germany — ²Institute for Mathematical Sciences, Imperial College, London, United Kingdom

In this talk we address the question how an admixture of spin-polarized Fermions alter the properties and especially the position of the superfluid transition of Bosons in an optical lattice. Different mechanism have been discussed in the literature focusing eiter on zero-temperature effects like self-trapping or thermal effects.

We have performed both analytic and numerical calculations to simultaneously account for finite temperature and interactions beyond the one-band Bose-Fermi-Hubbard model. We show results corresponding to realistic experimental parameters and discuss the regimes where the different effects are most important and also the interplay between them.