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C. Gneiting and K. Hornberger
Detecting entanglement in spatial interference
Phys. Rev. Lett 106, 210501 (2011)


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)   [ pdf, journal, arXiv:1103.2779 ]

doi:10.1103/PhysRevLett.106.210501            (c) The American Physical Society