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Entangled Optical Vortex Links
2011
Physical Review Letters
Optical vortices are lines of phase singularity which percolate through all optical fields. We report the entanglement of linked optical vortex loops in the light produced by spontaneous parametric downconversion. As measured by using a Bell inequality, this entanglement between topological features extends over macroscopic and finite volumes. The entanglement of photons in complex three-dimensional topological states suggests the possibility of entanglement of similar features in other quantum
doi:10.1103/physrevlett.106.100407
pmid:21469778
fatcat:65mc46qxfjgqbbwhcb5ulto3gi