Efficient-phase-encoding protocols for continuous-variable quantum key distribution using coherent states and postselection

Details Efficient-phase-encoding protocols for continuous-variable quantum key distribution using coherent states and postselection Efficient-phase-encoding protocols for continuous-variable quantum key distribution using coherent states and postselection

2006-08-18

arxiv.org/abs/quant-ph/0608144v1

Phys. Rev. A 74, 032302 (2006)

Physics

Quantum Physics

RevTeX4, 8 pages, 9 figures

Scientific paper

10.1103/PhysRevA.74.032302

We propose efficient-phase-encoding protocols for continuous-variable quantum key distribution using coherent states and postselection. By these phase encodings, the probability of basis mismatch is reduced and total efficiency is increased. We also propose mixed-state protocols by omitting a part of classical communication steps in the efficient-phase-encoding protocols. The omission implies a reduction of information to an eavesdropper and possibly enhances the security of the protocols. We investigate the security of the protocols against individual beam splitting attack.

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