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Q: Fachverband Quantenoptik und Photonik

Q 55: Transport and Localization of interacting Bosons 2

Q 55.3: Talk

Thursday, March 17, 2011, 15:00–15:15, BAR Schön

Wave packet surgery in driven optical lattices — •Stephan Arlinghaus and Martin Holthaus — Institut für Physik, Carl von Ossietzky Universität, D-26111 Oldenburg

The dynamics of particles in a periodic potential under the influence of homogeneous external forcing is governed by Bloch's acceleration theorem, provided the single-band approximation remains viable. However, interband transitions induced by strong time-periodic forces, which lie ouside the scope of this old approach, offer most interesting perspectives for coherent control. We show how a generalized acceleration theorem, based on the use of Floquet states, leads to novel control strategies, allowing one to selectively "cut out" certain parts from the particles' wave packets. Ultracold atoms in driven optical lattices provide experimentally accessible testing ground for these ideas.