1. Generation of tunable entanglement and violation of a Bell-like inequality between different degrees of freedom of a single photon
- Author
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Martin Hendrych, Michal Mičuda, Lorenzo Marrucci, Vincenzo D'Ambrosio, Adam Vallés, Juan P. Torres, Fabio Sciarrino, Universitat Politècnica de Catalunya. Institut de Ciències Fotòniques, Valles, A., D'Ambrosio, V., Hendrych, M., Micuda, M., Marrucci, Lorenzo, Sciarrino, F., and Torres, J. P.
- Subjects
Physics ,Quantum Physics ,Angular momentum ,Photon ,education ,FOS: Physical sciences ,CHSH inequality ,Quantum entanglement ,Polarization (waves) ,Atomic and Molecular Physics, and Optics ,Photon entanglement ,Quantum mechanics ,single photon ,Quantum Physics (quant-ph) ,Coherence (physics) - Abstract
We demonstrate a scheme to generate noncoherent and coherent correlations, i.e., a tunable degree of entanglement, between degrees of freedom of a single photon. Its nature is analogous to the tuning of the purity (first-order coherence) of a single photon forming part of a two-photon state by tailoring the correlations between the paired photons. Therefore, well-known tools such as the Clauser-Horne-Shimony-Holt (CHSH) Bell-like inequality can also be used to characterize entanglement between degrees of freedom. More specifically, CHSH inequality tests are performed, making use of the polarization and the spatial shape of a single photon. The four modes required are two polarization modes and two spatial modes with different orbital angular momentum., 7 pages, 5 figures. Updated to be consistent with published version
- Published
- 2014
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