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Journal Articles Physical Review Letters Year : 2017

Two-particle, four-mode interferometer for atoms


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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Dates and versions

hal-01551704 , version 1 (30-06-2017)
hal-01551704 , version 2 (17-10-2017)



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