Berlin 2014 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 66: Ultracold atoms and molecules II

Q 66.4: Talk

Friday, March 21, 2014, 14:45–15:00, DO26 208

Ground state cooling in an 1D optical lattice — •Ricardo Gomez, Carsten Robens, Isabelle Boventer, Jonathan Zopes, Wolfgang Alt, Andrea Alberti, and Dieter Meschede — Institut für Andgewante Physik (IAP), Bonn, Germany

Discrete-time quantum walks of neutral atoms in optical lattices allows to experimentally investigate complex transport phenomena, where the single constituents are allowed to coherently interact with each other [1].

We report on the ground state cooling of neutral atoms in the ground state of a 1D optical lattice. Microwave and Raman sideband cooling are used as cooling mechanisms for the axial and radial direction, respectively. To achieve a tight confinement in the radial direction, we use a blue-detuned doughnut-shaped dipole trap overlapped to the optical lattice.

The preparation in the motional ground state opens the way to use onsite coherent collisions between atoms to realize interacting quantum walks.

[1] A. Ahlbrecht, A. Alberti, D. Meschede, V. B. Scholz, A. H. Werner, and R. F. Werner, Molecular binding in interacting quantum walks, New J. Phys. 14, 073050 (2012)