Exploring phase coherence in a 2D lattice of Bose-Einstein condensates

Bose-Einstein condensates of rubidium atoms are stored in a two-dimensional periodic dipole force potential, formed by a pair of standing wave laser fields. The resulting potential consists of a lattice of tightly confining tubes, each filled with a 1D quantum gas. Tunnel coupling between neighborin...

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Bibliographic Details
Published in:Physical review letters 2001-10, Vol.87 (16), p.160405-160405, Article 160405
Main Authors: Greiner, M, Bloch, I, Mandel, O, Hänsch, T W, Esslinger, T
Format: Article
Language:English
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Summary:Bose-Einstein condensates of rubidium atoms are stored in a two-dimensional periodic dipole force potential, formed by a pair of standing wave laser fields. The resulting potential consists of a lattice of tightly confining tubes, each filled with a 1D quantum gas. Tunnel coupling between neighboring tubes is controlled by the intensity of the laser fields. By observing the interference pattern of atoms released from more than 3000 individual lattice tubes, the phase coherence of the coupled quantum gases is studied. The lifetime of the condensate in the lattice and the dependence of the interference pattern on the lattice configuration are investigated.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.87.160405