Flavor Degeneracy and Effects of Disorder in Ultracold Atom Systems

Details Flavor Degeneracy and Effects of Disorder in Ultracold Atom Systems Flavor Degeneracy and Effects of Disorder in Ultracold Atom Systems

2005-04-05

arxiv.org/abs/cond-mat/0504113v1

Advances in Solid State Physics 45, 109 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

13 pages, 9 eps figures included, Adv. Solid State Phys. (in press)

Scientific paper

Cold atoms in optical lattices offer an exciting new laboratory where quantum many-body phenomena can be realized in a highly controlled way. They can even serve as quantum simulators for notoriously difficult problems like high-temperature superconductivity. This review is focussed on recent developments and new results in multi-component systems. Fermionic atoms with SU(N) symmetry have exotic superfluid and flavor-ordered ground states. We discuss symmetry breaking, collective modes and detection issues. Bosonic multi-flavor ensembles allow for engineering of spin Hamiltonians which are interesting from a quantum computation point of view. Finally, we will address the competition of disorder and interaction in optical lattices. We present a complete phase diagram obtained within dynamical mean-field theory and discuss experimental observability of the Mott and Anderson phases.

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