Masahito Hayashi 2007 New J. Phys. 9 284 doi:10.1088/1367-2630/9/8/284
Masahito Hayashi
Show affiliationsWe develop a general theory for quantum key distribution (QKD) in both the forward error correction and the reverse error correction cases when the QKD system is equipped with phase-randomized coherent light with an arbitrary number of decoy intensities. For this purpose, generalizing Wang's expansion, we derive a convex expansion of the phase-randomized coherent state. We also numerically check that the asymptotic key generation rates are almost saturated when the number of decoy intensities is three.
03.67.Dd Quantum cryptography and communication security
03.67.Pp Quantum error correction and other methods for protection against decoherence
Issue 8 (August 2007)
Received 1 June 2007
Published 24 August 2007
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