A 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 an observation consistent with an entangled 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.

References in corpus (9)

• Hanbury Brown Twiss effect for ultracold quantum gases
• Essential entanglement for atomic and molecular physics
• An atomic Hong-Ou-Mandel experiment
• Maximal Violation of Bell Inequalities using Continuous Variables Measurements
• Tunable source of correlated atom beams
• Large violation of Bell inequalities using both particle and wave measurements
• Einstein-Podolsky-Rosen correlations from colliding Bose-Einstein condensates
• Proposal for a motional-state Bell inequality test with ultracold atoms
• Two-particle interference of electron pairs on a molecular level

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• The Hong-Ou-Mandel effect with atoms
• Characterizing twin-particle entanglement in double-well potentials
• Bell inequality, Einstein-Podolsky-Rosen steering and quantum metrology with spinor Bose-Einstein condensates
• Thermal counting statistics in an atomic two-mode squeezed vacuum state
• A matter wave Rarity-Tapster interferometer to demonstrate non-locality
• Production of a highly degenerate Fermi gas of metastable helium-3 atoms
• Experimental tests of Bell's inequalities: A first-hand account by Alain Aspect
• Close-coupled model of Feshbach resonances in ultracold ${}^3$He* and ${}^4$He* atomic Collisions
• Coherent coupling of momentum states: selectivity and phase control
• Boson sampling with ultracold atoms in a programmable optical lattice
• Hanburry Brown and Twiss, Hong Ou and Mandel effects and other landmarks in Quantum Optics: from photons to atoms
• Atomic twin-beams and violation of a motional-state Bell inequality from a phase-fluctuating quasi-condensate source
• Proposal for a Bell Test with Entangled Atoms of Different Mass
• Bell correlations between momentum-entangled pairs of ${}^4{\text{He}}^{\ast }$ atoms
• Hong-Ou-Mandel interference of more than 10 indistinguishable atoms