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Two-particle, four-mode interferometer for atoms

Abstract : We present a free-space interferometer to observe two-particle interference of a pair of atoms with entangled momenta. The source of atom pairs is a Bose-Einstein condensate subject to a dynamical instability, and the interferometer is realized using Bragg diffraction on optical lattices, in the spirit of our recent Hong-Ou-Mandel experiment. We report on an observation ruling out the possibility of a purely mixed state at the input of the interferometer. We explain how our current setup can be extended to enable a test of a Bell inequality on momentum observables.
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https://hal-iogs.archives-ouvertes.fr/hal-01551704
Contributor : Marc Cheneau <>
Submitted on : Tuesday, October 17, 2017 - 10:26:47 AM
Last modification on : Wednesday, September 23, 2020 - 4:37:59 AM

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Pierre Dussarrat, Maxime Perrier, Almazbek Imanaliev, Raphael Lopes, Alain Aspect, et al.. Two-particle, four-mode interferometer for atoms. Physical Review Letters, American Physical Society, 2017, 119, pp.173202. ⟨10.1103/PhysRevLett.119.173202⟩. ⟨hal-01551704v2⟩

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