Superfluidity near phase separation in Bose-Fermi mixtures
Physik Department, Technische Universität München, 85747 Garching, Germany
Corresponding author: a Tilman.Enss@ph.tum.de
Revised: 9 December 2008
Published online: 9 January 2009
We study the transition to fermion pair superfluidity in a mixture of interacting bosonic and fermionic atoms. The fermion interaction induced by the bosons and the dynamical screening of the condensate phonons due to fermions are included using the nonperturbative Hamiltonian flow equations. We determine the bosonic spectrum near the transition towards phase separation and find that the superfluid transition temperature may be increased substantially due to phonon damping.
PACS: 67.85.De – Dynamic properties of condensates; excitations, and superfluid flow / 67.85.Fg – Multicomponent condensates; spinor condensates / 67.85.Pq – Mixtures of Bose and Fermi gases / 74.20.Fg – BCS theory and its development
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2009