Entangling photons of different colors: Researchers develop a novel chip-based device for quantum communication - Science Daily

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Entangling photons of different colors: Researchers develop a novel chip-based device for quantum communication (https://www.sciencedaily.com/releases/2019/02/190225170254.htm) Science Daily
Entangling photons of different colors (https://phys.org/news/2019-02-entangling-photons.html) Phys.org
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