Berlin 2005 – wissenschaftliches Programm

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Q: Quantenoptik und Photonik

Q 41: Quantengase II

Q 41.4: Vortrag

Dienstag, 8. März 2005, 15:45–16:00, HU Kinosaal

Production of a single 2-D condensate from an array of BECs in an optical lattice — •Sabine Stock, Baptiste Battelier, Zoran Hadzibabic, and Jean Dalibard — Laboratoire Kastler Brossel, ENS, 24 rue Lhomond, 75005 Paris, France

I will discuss our studies of an array of two-dimensional ⁸⁷Rb Bose-Einstein condensates, created in a one-dimensional optical lattice with a lattice period of several micrometers. This configuration allows us to load up to 10⁴ atoms into each potential well and to completely isolate the BECs from each other. The potential wells can also be made steep enough, so that every well contains a 2-dimensional cloud. When studying matter wave interference in this system, we observed high-contrast interference between 30 condensates with uncorrelated phases[1]. These observations are quantitatively explained with a simple theoretical model which generalizes the analysis of the interference of two independent condensates.

It is also possible to separate a single two-dimensional condensate from this configuration by applying a magnetic field gradient to the lattice. I will present first results achieved by this setup.

[1] Z. Hadzibabic et al, PRL 93, 180403 (2004).