Hamburg 2009 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 30: Poster II
Q 30.15: Poster
Dienstag, 3. März 2009, 16:30–19:00, VMP 9 Poster
Quantum Transport of Atoms in Fourier-Synthesized Optical Lattices — •Sebastian Kling1, Tobias Salger1, Luis Morales-Molina2, Carsten Geckeler1, Tim Hecking1, and Martin Weitz1 — 1Institut für Angewandte Physik der Universität Bonn, Wegelerstr. 8, 53115 Bonn, Germany — 2Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542
We report on experimental results on quantum transport of Bose-Einstein condensates in periodic optical potentials of variable spatial symmetry. We have studied the band structure of the Fourier-Synthesized lattices by means of Landau-Zener transitions and Bloch oscillations. More recently, we have investigated quantum transport in driven optical potentials to yield a Hamiltonian (i.e. within the interaction time dissipation-free) quantum ratchet.
To realize such lattice potentials of variable spatial symmetry, we superimpose a conventional standing wave of λ/2 spatial periodicity with a fourth-order optical potential of λ/4 spatial periodicity. The latter is generated using the dispersive properties of multiphoton Raman transitions.