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Q: Fachverband Quantenoptik und Photonik

Q 30: Poster II

Q 30.23: Poster

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

Coherent motional control and interferometry of single atoms in state selective potentials — •Tan Wang, Wolfgang Alt, Jai-Min Choi, Leonid Förster, Michał Karski, Andreas Steffen, Artur Widera, and Dieter Meschede — Institut für Angewandte Physik, Uni Bonn

In our experiment we have achieved full quantum control over single Caesium atoms trapped in a 1D optical lattice, including the position along the lattice axis and the electronic and vibronic states.

We present our implementation for resolved sideband cooling relying on microwave radiation and state selective potentials. Displacing the trapping potentials for two spin states allows to effectively control the Lamb-Dicke parameter in the system and axial cooling to the vibrational ground state. Starting from the ground state, we drive coherent transitions to various vibrational states, where the Rabi-frequency depends on the displacement of the trap potentials. Further, we coherently split the wave function of single trapped atoms and delocalise it over several lattice sites using the spin dependent transport. Recombining the wave functions, we have realised a single trapped atom interferometer.

Our results point to controlled interactions of two neutral Caesium atoms.