A single photon, the “elementary particle” of light, is the natural candidate for the transmission of information in future information networks that take advantage the laws of quantum physics. Familiar light sources such as bulbs, LEDs, and lasers, emit billions of photons simultaneously, making picking out just one to encode a single quantum bit (qubit) an impossible task. To generate and receive the individual photons required for quantum computing and communication, we need revolutionary quantum light sources and detectors. These can also enable fascinating novel communication protocols such as quantum teleportation.
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