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Journal Article

Detecting Entanglement in Spatial Interference


Hornberger,  K.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Gneiting, C., & Hornberger, K. (2011). Detecting Entanglement in Spatial Interference. Physical Review Letters, 106(21): 210501.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0029-8CB9-A
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.