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 (5)

• An atomic Hong-Ou-Mandel experiment
• Large violation of Bell inequalities using both particle and wave measurements
• Proposal for a motional-state Bell inequality test with ultracold atoms
• Einstein-Podolsky-Rosen correlations from colliding Bose-Einstein condensates
• Two-particle interference of electron pairs on a molecular level

Cited by in corpus (1)

• Proposal for a Quantum Test of the Weak Equivalence Principle with Entangled Atomic Species