Detecting entanglement in spatial interference

Abstract

We discuss an experimentally amenable class of two-particle states of motion giving rise to nonlocal spatial interference under position measurements. Using the concept of modular variables, we derive a separability criterion which is violated by these non-Gaussian states. While we focus on the free motion of material particles, the presented results are valid for any pair of canonically conjugate continuous variable observables and should apply to a variety of bipartite interference phenomena.

4 pages; corresponds to published version

References in corpus (4)

• A Kapitza-Dirac-Talbot-Lau interferometer for highly polarizable molecules
• Bell test for the free motion of material particles
• State-independent quantum contextuality for continuous variables
• Molecular Feshbach dissociation as a source for motionally entangled atoms