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A: Fachverband Atomphysik

A 22: Ultra-cold atoms, ions and BEC III (with Q)

A 22.3: Vortrag

Mittwoch, 25. März 2015, 11:30–11:45, M/HS1

Beyond Mean-Field Dynamics of Ultracold Bosonic Atoms in Lattices — •Axel U.J. Lode and Christoph Bruder — Department of Physics, University of Basel, Klingelbergstr. 82, CH-4056 Basel, Switzerland

The dynamics of ultracold bosons in optical lattices is a rich field with many fundamental physics questions and applications. Cold atoms in lattices represent a very versatile tool for the quantum simulation of various other states of matter. Theoretical methods for the treatment of the dynamics in one-dimensional lattices are available, but despite the large interest in the field, to date no reliable theoretical method to describe the dynamics of two- and three-dimensional systems has been formulated. An application of the multiconfigurational time-dependent Hartree method for bosons (MCTDHB, see http://ultracold.org) to describe the dynamics of the Bose-Hubbard Hamiltonian yields reliable predictions with a controlled error for the dynamics in one-, two-, and three-dimensional systems and therefore fills in this gap. The theory is introduced and example applications of beyond mean-field dynamics are discussed.