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In a new “twist” on quantum communication using optical fiber, researchers from the University of Witwatersrand (Wits) and Huazhong University of Science and Technology (HUST) have demonstrated that multiple quantum patterns of twisted light can be transmitted across a conventional fiber link that supports only one light pattern. The research could open the way to secure transport of quantum data across fiber networks, using multiple dimensions of light.
The researchers made multiple patterns of light transmittable over a single fiber by engineering entanglement in two degrees of freedom of light, polarization, and pattern. The polarized photon was conveyed over the fiber, and the other photon was able to access the…READ MORE