[Triumf-seminars] TRIUMF Theory Seminar today at 14:00

[postmaster at admin.triumf.ca]

Date/Time: Tue 2009-09-22 at 14:00

Location:  Theory Group Room   

Speaker:   Doerte Blume (Washington State University)

Title:     Microscopic treatment of dilute trapped Fermi gases

Abstract: Over the past few years, dilute atomic Fermi gases have emerged as an ideal model system for investigating long-standing problems in condensed matter, nuclear and astro physics. The BEC-BCS crossover, for example, has been extensively studied in the context of conventional superconductors and is currently of great interest to the cold-atom community. This talk investigates the crossover physics of trapped two-component s-wave interacting Fermi gases theoretically within non-perturbative, fully microscopic frameworks. To this end, two distinct numerical approaches, a basis-set type expansion approach and the diffusion quantum Monte Carlo technique, are employed and compared. These techniques allow for an accurate treatment of dilute two-component Fermi gases through the entire crossover regime, including the weakly-interacting BCS and BEC regimes and the strongly-interacting regime. Unique universal properties of two-component Fermi gases under spherically symmetric harmonic confinement are demonstrated for all scattering lengths, and several implications of these unique properties are discussed.



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