Measuring two-photon orbital angular momentum entanglement
| Autor: | Fernández Calvo, Gabriel, Picón Álvarez, Antonio, Bramon, Albert, American Physical Society |
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| Rok vydání: | 2007 |
| Předmět: |
Physics
Angular momentum Quantum Physics FOS: Physical sciences Atomic and Molecular Physics and Optics Azimuthal quantum number Total angular momentum quantum number Quantum electrodynamics Quantum mechanics Orbital motion Angular momentum of light Angular momentum coupling Orbital angular momentum multiplexing Orbital angular momentum of light Quantum Physics (quant-ph) Optics (physics.optics) Physics - Optics |
| Zdroj: | Dipòsit Digital de Documents de la UAB Universitat Autònoma de Barcelona Recercat. Dipósit de la Recerca de Catalunya instname Recercat: Dipósit de la Recerca de Catalunya Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Popis: | We put forward an approach to estimate the amount of bipartite spatial entanglement of down-converted photon states correlated in orbital angular momentum and the magnitude of the transverse (radial) wave vectors. Both degrees of freedom are properly considered in our framework, which only requires azimuthal local linear optical transformations and mode selection analysis with two fiber detectors. The coincidence distributions predicted by our approach give an excellent fit to the distributions measured in a recent experiment aimed to show the very high-dimensional transverse entanglement of twin photons from a down-conversion source. Our estimate for the Schmidt number is substantially lower but still confirms the presence of high-dimensional entanglement. Extended paper of a published version in PRA, with some extra appendices |
| Databáze: | OpenAIRE |
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