Hannover 2010 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 23: Poster II

A 23.40: Poster

Donnerstag, 11. März 2010, 16:30–19:00, Lichthof

Ratchet effect in driven Bose-Einstein condensates — •Martin Heimsoth, Charles Edward Creffield, and Fernando Sols — Facultad de Ciencias Fisicas, Universidad Complutense de Madrid

The generation of a particle current by exposing the system to an unbiased asymmetric periodic driving field is known as the ratchet effect. We demonstrate numerically that a current of a Bose-Einstein condensate whose motion is effectively restricted to a torus can be produced via a driving field with broken spatiotemporal symmetries. We explore the strong driving regime beyond the results presented in Ref [1]. Furthermore, we present a comparison of our numerical results with a recent experimental realization [2].

[1] C.E. Creffield, F. Sols, Phys. Rev. Lett. 103 (2009)

[2] T. Salger et al, Science 326 (2009)