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Generation and measurement of arbitrary four-dimensional spatial entanglement between photons in multicore fibers

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High-dimensional entanglement is a valuable resource for secure and efficient quantum information processing. A major challenge for practical use of multidimensional quantum systems is the establishment of controls over arbitrary superposition states in realistic conditions. This work demonstrates spatially entangled photon pairs propagating through two separate four-core optical fibers with the amplitudes and phases of the superposition being independently controllable. Using quantum state analyzers that can detect arbitrary multicore superposition states, Bell-type CGLMP inequalities in two, three, and four dimensions are directly tested. Enhanced violation of the inequality by slight nonmaximality of entanglement is also demonstrated.



所属栏目:Quantum Optics

基金项目:R&D Convergence Program of the NST (CAP-15-08-KRISS); KRISS Project (GP2018-0017-04).




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Hee Jung Lee:Korea Research Institute of Standards and Science (KRISS), Daejeon 34113, South KoreaCurrent address: Agency for Defense Development, Daejeon 34186, South Korea
Hee Su Park:Korea Research Institute of Standards and Science (KRISS), Daejeon 34113, South Korea

联系人作者:Hee Su Park(hspark@kriss.re.kr)

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Hee Jung Lee and Hee Su Park, "Generation and measurement of arbitrary four-dimensional spatial entanglement between photons in multicore fibers," Photonics Research 7(1), 19-27 (2019)

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