Atomic, Molecular, and Optical Physics Seminar
Stability of Bose and Fermi Gases with Isotropic and Anisotropic Interactions
Professor Doerte
Blume
Department of Physics and Astronomy
Washington State University
The behaviors of weakly interacting isotropic Bose gases have been successfully modeled within a meanfield framework. To this end, one replaces the true atomatom potential by a contact interaction, whose strength is given by the swave scattering length, and solves the resulting manybody Schroedinger equation at the Hartree level. The resulting nonlinear singleparticle Schroedinger equation, also referred to as GrossPitaevskii equation, predicts many behaviors of inhomogeneous Bose gases accurately, including the onset of instability for Bose systems with negative twobody swave scattering length for a critical number of particles. This talk discusses the validity regime of meanfield treatments for anisotropic Bose gases and Fermi gases, and investigates the stability of these systems within the meanfield framework and within alternative microscopic frameworks.

Monday, December 3, 2007
4:00 PM
Gant Science Complex
Physics Department
Room P121