Effect of Interactions on Harmonically Confined Bose-Fermi Mixtures in Optical Lattices

Michiel Snoek, Irakli Titvinidze, Immanuel Bloch, and Walter Hofstetter
Phys. Rev. Lett. 106, 155301 – Published 14 April 2011

Abstract

We investigate a Bose-Fermi mixture in a three-dimensional optical lattice, trapped in a harmonic potential. Using generalized dynamical mean-field theory, which treats the Bose-Bose and Bose-Fermi interaction in a fully nonperturbative way, we show that for experimentally relevant parameters a peak in the condensate fraction close to the point of vanishing Bose-Fermi interaction is reproduced within a single-band framework. We identify two physical mechanisms contributing to this effect: the spatial redistribution of particles when the interspecies interaction is changed and the reduced phase space for strong interactions, which results in a higher temperature at fixed entropy.

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  • Received 2 November 2010

DOI:https://doi.org/10.1103/PhysRevLett.106.155301

© 2011 American Physical Society

Authors & Affiliations

Michiel Snoek1, Irakli Titvinidze2, Immanuel Bloch3,4, and Walter Hofstetter2

  • 1Institute for Theoretical Physics, University of Amsterdam, 1090 GL Amsterdam, The Netherlands
  • 2Institut für Theoretische Physik, Johann Wolfgang Goethe-Universität, 60438 Frankfurt/Main, Germany
  • 3Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany
  • 4Ludwig-Maximilians-Universität, Schellingstraße 4/II, 80799 München, Germany

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Vol. 106, Iss. 15 — 15 April 2011

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