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2013
Journal Article
Titel
Einstein-Podolsky-Rosen spatial entanglement in ordered and Anderson photonic lattices
Abstract
We demonstrate quantum walks of a photon pair in a spatially extended Einstein-Podolsky-Rosen state coupled into an on-chip multiport photonic lattice. By varying the degree of entanglement we observe Anderson localization for pairs in a separable state and Anderson colocalization for pairs in an Einstein-Podolsky-Rosen entangled state. In the former case, each photon localizes independently, while in the latter neither photon localizes, but the pair colocalizes-revealing unexpected survival of the spatial correlations through strong disorder.