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Updated: Feb 27, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Experimental Demonstration of Four-Dimensional Photonic Spatial Entanglement between Multi-core Optical Fibres
Hee Jung Lee1, Sang-Kyung Choi1, Hee Su Park2
1Korea Research Institute of Standards and Science, Daejeon, 34113, South Korea.
Abstract:
Fibre transport of multi-dimensional photonic quantum states promises high information capacity per photon without space restriction. This work experimentally demonstrates transmission of spatial ququarts through multi-core optical fibres and measurement of the entanglement between two fibres with quantum state analyzers, each composed of a spatial light modulator and a single-mode fibre. Quantum state tomography reconstructs the four-dimension entangled state that verifies the nonlocality through concurrences in two-dimensional subspaces, a lower bound of four-dimensional concurrence and a Bell-type CGLMP inequality.
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