Stuttgart 2012 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 40: Poster: Ultra-cold atoms, ions and BEC

A 40.32: Poster

Donnerstag, 15. März 2012, 16:30–19:00, Poster.V

Phase control of optical lattice by the interferometer — •Amir Mohamamdi and Johannes Hecker Denschlag — Institut für Quantenmaterie, Universität Ulm, Albert-Einstein-Allee 45, 89081 Ulm, Germany

Optical lattices are used as a fundamental tool for investigating the physics of ultracold atoms [1]. Particularly interesting are superlattices, which are generated by the superposition of two lattices with different wavelengths. In a superlattice of period two, the relative height of the potential wells can be varied by controlling the relative phase of the two lattices. In this way, particles can be moved between lattice wells in a controlled way, making it possible to realize quantum information schemes or measure particle correlations [2]. We present a new scheme to stabilize the phase of a 1D optical lattice using an interferometric scheme. A Michelson interferometer is used to measure the relative phase of two counterpropagating laser beams. Using two AOMs, this phase can then be stabilized. We discuss our experimental results and compare with existing schemes.

References: [1] I. Bloch, nature physics, 1, 23, 2005.-- [2] O. Romero-Isart and J. José Phys. Rev. A, 76, 052304 (2007).