Flavor degeneracy and disorder in ultracold atoms
Abstract
Optical lattices offer the possibility of realizing in a controlled way quantum many-body phenomena which cannot be achieved in solids. In this talk I will focus on two major topics: I) Multi-component systems (SU(N) Fermi, Bose, Bose-Fermi) with flavor degeneracy can lead to new superfluid and flavor-ordered insulating states. I will discuss symmetry breaking in the ground state and address detection issues, e.g. the structure of collective modes which can be observed via Bragg scattering. II) Fermionic atoms in an optical lattice experience Anderson localization at sufficiently strong disorder. Interactions among the atoms induce a competing tendency towards delocalization. I will present a complete phase diagram obtained within the nonperturbative dynamical mean-field theory and discuss experimental observability of the Mott and Anderson phases.
- Publication:
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APS March Meeting Abstracts
- Pub Date:
- March 2004
- Bibcode:
- 2004APS..MARH28009H