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Nature Physics 4, 268–269 (1 April 2008) | doi:10.1038/nphys927
Hyperentanglement: Breaking the communication barrier
Abstract
Quantum entanglement, the strange non-classical correlation between quantum systems, enables the implementation of science-fiction-like communication tasks. As a prototypical example, in the quantum superdense coding' protocol, a single quantum bit can carry up to two bits of information — an impossible feat for any ordinary classical bit.
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