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Paired-Fermion superfluids with ultracold atoms

Speaker: David Huse, Princeton University
When: October 16, 2007 (Tue), 03:30PM to 04:30PM
Hosted by: Antonio Castro Neto
View the poster for this event.

This event is part of the Department Colloquia Series. Colloquia are at 3:30 in the Metcalf Science Center (SCI 107) Refreshments will be served at 3:15 in the 1st Floor Lounge

Abstract: The partially-polarized two-species Fermi gas with an attractive inter-species contact interaction is being studied experimentally using cold atoms. This system has a rich zero-temperature phase diagram, with various superfluid phases, as well as a regime of phase separation. One phase of long-standing interest is the Fulde-Ferrell-Larkin-Ovchinnikov superfluid, where the Cooper pairs condense at nonzero center-of-mass momenta. This phase is due to a Fermi surface nesting and can thus be enhanced by making the system quasi-one-dimensional, which is feasible by putting the gas in an optical lattice. I will discuss recent experimental and theoretical work on these systems.

Reference to our work: M. M. Parish, S. K. Baur, E. J. Mueller & D. A. Huse, arXiv:0709.1120.