Observation of atom pairs in spontaneous four wave mixing of two colliding Bose-Einstein Condensates

Details Observation of atom pairs in spontaneous four wave mixing of two colliding Bose-Einstein Condensates Observation of atom pairs in spontaneous four wave mixing of two colliding Bose-Einstein Condensates

2007-04-23

arxiv.org/abs/0704.3047v4

Physical Review Letters 99, 15 (2007) 150405

Physics

Quantum Physics

A few typos have been corrected

Scientific paper

10.1103/PhysRevLett.99.150405

We study atom scattering from two colliding Bose-Einstein condensates using a position sensitive, time resolved, single atom detector. In analogy to quantum optics, the process can also be thought of as spontaneous, degenerate four wave mixing of de Broglie waves. We find a clear correlation between atoms with opposite momenta, demonstrating pair production in the scattering process. We also observe a Hanbury Brown and Twiss correlation for collinear momenta, which permits an independent measurement of the size of the pair production source and thus the size of the spatial mode. The back to back pairs occupy very nearly two oppositely directed spatial modes, a promising feature for future quantum optics experiments.

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