Sub-Poissonian number differences in four-wave mixing of matter waves

Details Sub-Poissonian number differences in four-wave mixing of matter waves Sub-Poissonian number differences in four-wave mixing of matter waves

2010-08-04

arxiv.org/abs/1008.0845v3

Physical Review Letters 105, 19 (2010) 190402

Physics

Condensed Matter

Quantum Gases

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.105.190402

We demonstrate sub-Poissonian number differences in four-wave mixing of Bose-Einstein condensates of metastable helium. The collision between two Bose-Einstein condensates produces a scattering halo populated by pairs of atoms of opposing velocities, which we divide into several symmetric zones. We show that the atom number difference for opposing zones has sub-Poissonian noise fluctuations whereas that of nonopposing zones is well described by shot noise. The atom pairs produced in a dual number state are well adapted to sub shot-noise interferometry and studies of Einstein-Podolsky-Rosen-type nonlocality tests.

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