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A: Fachverband Atomphysik

A 15: Poster I

A 15.53: Poster

Tuesday, March 3, 2009, 16:30–19:00, VMP 9 Poster

Signature of long-range-molecules in a dipole blocked degenerate atom gas — •Weibin Li and Thomas Pohl — Max-Planck-Institut für Physik komplexer Systeme, Dresden, Germany

The low energy scattering from the Rydberg-electron and a surrounding ground-state atom in ultracold gases yields an attractive potential, giving rise to exotic, ultralong range molecules [1], for which experimental evidence has been reported recently [2]. Here, we study the coherent excitation dynamics in dipole blocked mesoscopic ensembles, in which all but a single excitation is inhibited by the strong Rydberg-Rydberg interaction. We develop a large scale Monte-Carlo approach to describe the fully correlated excitation dynamics. In particular we study the effect of the interactions on the coherence properties of collective, many-body Rabi oscillations, which are important for proposed applications in quantum information. Finally, we examine possible approaches to experimentally probe the highly structured molecular potential curves.

[1] C. H. Greene, A. S. Dickinson and H. R. Sadeghpour, Phys. Rev. Lett. 85, 2458 (2000).

[2] V. Bendkowsky, et.al., arxiv:0809.2961 (2008).