Single-photon emitter for quantum cryptography

By Ann Steffora Mutschler – For quantum cryptography to work, it’s necessary to encode the message—which could be a bank password or a piece of military intelligence, for example—just one photon at a time. That way, the sender and the recipient will know whether anyone has tampered with the message.

University of Michigan researchers have demonstrated a simpler, more efficient single-photon emitter that can be made using traditional semiconductor processing techniques. more>

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