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Q: Quantenoptik und Photonik

Q 5: Stark korrelierte Systeme

Q 5.3: Vortrag

Montag, 13. März 2006, 12:10–12:25, HII

Quantum Phases and Dynamics of Ultracold Atomic Gases in 1D Superlattices — •Markus Hild, Felix Schmitt, and Robert Roth — Institut fuer Kernphysik, Technische Universitaet Darmstadt

We discuss the properties of ultracold atomic gases in inhomogeneous 1D optical lattices in the theoretical framework of the Hubbard model. Static and dynamic properties are addressed via an exact numerical solution using a basis of Fock-states. The restriction of the many-body Hilbert space to the physically relevant states allows us to handle moderate system sizes and to access all important observables. We study the phase diagram of quantum gases in disordered- and superlattices to gain information on the characteristics of the various quantum phases, including the Mott-insulator- and the Bose-glass-phase. In particular, the dynamical response of the system in time-dependent lattice potentials provides signatures of the quantum phases which are directly accessible by experiment.