Using entangled photons and a low-loss optical delay, we implement a novel quantum cryptography protocol in which every photon contributes to the key, yielding enhanced efficiency, and an advantage for six- versus four-basis state protocols.
© 2006 Optical Society of America
(030.0030) Coherence and statistical optics : Coherence and statistical optics
(030.5260) Coherence and statistical optics : Photon counting
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.4510) Fiber optics and optical communications : Optical communications
E. Jeffrey, J. Altepeter, and P. Kwiat, "Relativistic Quantum Cryptography," in Frontiers in Optics, OSA Technical Digest (CD) (Optical Society of America, 2006), paper FWB1.
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