Solid Light
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Solid Light is a theory that says light can behave as a solid. Andrew Greentree, Jared Cole, and Lloyd Hollenberg of the University of Melbourne, and Charles Tahan of the University of Cambridge demonstrated theoretically how to engineer a phase transition in photons, leading them to change their state so that they do interact with each other. According to them this technology will help build new kinds of faster computers.[1][2]