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A: Atomphysik

A 11: Cooling and Trapping III (joint session A and Q)

A 11.4: Vortrag

Mittwoch, 4. April 2001, 17:00–17:15, H3010

Coherent dynamics of a BEC in an optical lattice — •J. Denschlag^1,2, J. Simsarian¹, D. Cho¹, K. Helmerson¹, S. Rolston¹, and W.D. Phillips¹ — ¹NIST, Gaithersburg, MD 20899, USA — ²Institut für Experimentalphysik, Universität Innsbruck

We performed experiments with a sodium Bose-Einstein condensate (BEC) in a 1D optical lattice and observed the coherent evolution of the Bloch states in the lattice. By adiabatically turning on the optical lattice we were able to put more than 99.5% of the BEC into the groundstate of the lattice. Starting from the lattice ground state other lattice states can be coherently populated when we subsequently manipulate the lattice. Using Bloch oscillations a convenient accelerator is demonstrated which is able to impart many photon recoils to a BEC wavepacket.