Darmstadt 2008 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 40: Quantengase (Bosonen I)

Q 40.6: Vortrag

Donnerstag, 13. März 2008, 15:15–15:30, 1A

Phase fluctuations in one-dimensional quasi-condensates — •Stephanie Manz, Thomas Betz, Christian Koller, Robert Bücker, Wolfgang Rohringer, Aurélien Perrin, Thorsten Schumm, and Jörg Schmiedmayer — Atominstitut der Österreichischen Universitäten, Technische Universität Wien, Stadionallee 2, A-1020 Vienna, Austria

Due to the possibility to fabricate wire structures down to the micrometer scale, atomchips are ideally suited to examine ultracold one-dimensional systems. In contrast to the three-dimensional case, one-dimensional sytems do not exhibit long-range order. The respective phase fluctuations can either be seen in interference experiments with split one-dimensional Bose-Einstein condensates [1,2] or by directly observing density modulations in time-of-flight images [3].

We study the ballistic expansion of tightly confined atomic clouds and compare the results to theory.

[1] S. Hofferberth et al., Nature Phys. 2 710 (2006).

[2] G.-B. Jo et al., arXiv:0706.4041v3

[3] D. Hellweg et al., Appl. Phys. B 73 173 (2001).