Teams at the University of Southern Denmark, Arhaus University, and the University of Maryland’s Joint Quantum Institute have demonstrated the ability to subtract a photon of light from a laser beam. A unique property of light is its non-interaction with other photons as they pass through one-another. This property benefits quantum communication with high-success rates of transmission over long distances with encoded data. The study’s goal is to manipulate photons using other photons; causing photons to interact with one-another. The benefit lays within photon-photon interaction as it pertains to quantum information science. The team admits there is much study to complete to fully understand these interactions. 

Getting photons to interact may be key to quantum applications. (Image Credit: Timm Weitkamp)

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