Coherent Collisions between Bose-Einstein Condensates

Details Coherent Collisions between Bose-Einstein Condensates Coherent Collisions between Bose-Einstein Condensates

2002-09-03

arxiv.org/abs/cond-mat/0209067v1

Physics

Condensed Matter

Soft Condensed Matter

4.2 pages, 4 figures, please take postscript version for best quality of pictures

Scientific paper

10.1103/PhysRevLett.90.030403

We study the non-degenerate parametric amplifier for matter waves, implemented by colliding two Bose-Einstein condensates. The coherence of the amplified waves is shown by observing high contrast interference with a reference wave and by reversing the amplification process. Since our experiments also place limits on all known sources of decoherence, we infer that relative number squeezing is most likely present between the amplified modes. Finally, we suggest that reversal of the amplification process may be used to detect relative number squeezing without requiring single-particle detection.

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