Physicists have exploited the quantum nature of photons to transmit information for some time now. And in doing so they've discovered just how powerful quantum communication can be compared to the classical kind.
Instead of sending the 0s and 1s of digital code, quantum communicators can send information in a superposition of states that represent both 0s and 1s at the same time. What's more, separate quantum objects such as a pair of photons can be entangled, which means they share the same existence even if they are widely separated. That leads to a form of quantum information that has no classical counterpart./.../
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