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A: Fachverband Atomphysik

A 33: SYRA 3: Ultracold Rydberg Atoms and Molecules 3

A 33.10: Vortrag

Donnerstag, 15. März 2012, 12:45–13:00, V7.03

Collective interactions in Rydberg-dressed Bose-Einstein condensates — •Nils Henkel and Thomas Pohl — Max Planck Institute for the Physics of Complex Systems, Dresden

We investigate a Bose-Einstein condensate where atoms are dressed to high Rydberg states with strong van der Waals interactions. Solving exactly the internal many-body state dynamics, we show that this leads to effective ground state interactions with genuine many-body character. In the limit of large laser detunings, two-body interactions dominate [1,2] while many-body interactions become relevant in the strong-driving limit, i.e. in the limit of large laser intensities or weak detunings. We study the effects of these higher order interactions and show that nonlocal phenomena found for binary interactions are still also observable in the presence of strong collective, i.e. genuine many-body, interactions.
N. Henkel, R. Nath and T. Pohl, Phys. Rev. Lett. 104 195302
F. Maucher et al., Phys. Rev. Lett. 106 170401