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Letter
Nature Physics 4, 282–286 (1 April 2008) | doi:10.1038/nphys919
Beating the channel capacity limit for linear photonic superdense coding
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Abstract
Dense coding is arguably the protocol that launched the field of quantum communication. Today, however, more than a decade after its initial experimental realization, the channel capacity remains fundamentally limited as conceived for photons using linear elements.
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