Hannover 2010 – scientific programme

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A: Fachverband Atomphysik

A 19: Ultra-Cold Plasmas and Rydberg System

A 19.4: Talk

Thursday, March 11, 2010, 11:30–11:45, B 302

Investigating Rydberg-Surface Interactions on an Atom Chip — •Atreju Tauschinsky, Rutger M.T. Thijssen, Shannon Whitlock, N.J. van Druten, H.B. van Linden van den Heuvell, and R.J.C. Spreeuw — Van der Waals-Zeeman Institute, Universiteit van Amsterdam, Amsterdam, The Netherlands

We have prepared an array of ultracold atomic ensembles confined in a 2D-lattice of microtraps on a chip. This system holds great promise as a quantum register, assuming interactions between neighbouring ensembles can be controlled. For this purpose we are studying long-range Rydberg dipole-dipole interactions.

An open question is the influence of nearby surfaces on the properties of Rydberg atoms. We coherently excite interacting Rydberg atoms in an ultracold gas close to the chip and use an electromagnetically induced transparency resonance to probe atom-atom and atom-surface interactions.

Results on the influence of the surface on an ensemble of interacting Rydberg atoms as well as the effects of atom-atom interactions will be presented.