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A: Fachverband Atomphysik

A 21: Atomic systems in external fields II

A 21.5: Vortrag

Donnerstag, 17. März 2011, 15:00–15:15, BAR 205

3D ground state cooling in a doughnut-shaped optical trap — •Sebastian Hild, Andrea Alberti, Wolfgang Alt, Noomen Belmechri, Michal Karski, Kohei Katayama, Arif Mawardi, Andreas Steffen, Artur Widera, and Dieter Meschede — Institut für Angewandte Physik der Universität Bonn, Germany

We report on our approach to 3D ground state cooling in a state-selective 1D optical lattice potential, paving the way to create entanglement via controlled cold collisions. Due to weak transversal confinement in the 1D standing wave the Lamb-Dicke regime can only be reached in the axial direction. By superposing a blue detuned doughnut shaped beam, the trap frequencies in the radial direction can be increased significantly. Raman lasers will then be used to reach the vibrational ground state. This will also allow us to prepare Cs atoms in their motional ground state. Increased coherence times open the perspective to extend the prior work, such as quantum walks, to new regimes of unprecented quantum control over single neutral atoms.