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Bounds and optimisation of orbital angular momentum bandwidths within parametric down-conversion systems
F. M. Miatto, D. Giovannini, J. Romero +3
The measurement of high-dimensional entangled states of orbital angular momentum prepared by spontaneous parametric down-conversion can be considered in two separate stages: a gene…
Experimental high-dimensional two-photon entanglement and violations of generalised Bell inequalities
Adetunmise C. Dada, Jonathan Leach, Gerald S. Buller +2
Quantum entanglement plays a vital role in many quantum information and communication tasks. Entangled states of higher dimensional systems are of great interest due to the extende…
Spin-orbit hybrid entanglement of photons and quantum contextuality
Ebrahim Karimi, Jonathan Leach, Sergei Slussarenko +7
We demonstrate electromagnetic quantum states of single photons and of correlated photon pairs exhibiting "hybrid" entanglement between spin and orbital angular momentum. These sta…
Entangled topological features of light
J. Romero, J. Leach, B. Jack +4
We report the entanglement of topological features, namely, isolated, linked optical vortex loops in the light from spontaneous parametric down-conversion (SPDC). In three dimensio…