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

Journal Article · Fri Sep 15 00:00:00 EDT 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.74.032302· OSTI ID:20857655

Namiki, Ryo; Hirano, Takuya ^[1]

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1. CREST Research Team for Photonic Quantum Information, Division of Material Physics, Department of Material Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531 (Japan)

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.

• OSTI ID: 20857655
• Journal Information: Physical Review. A, Vol. 74, Issue 3; Other Information: DOI: 10.1103/PhysRevA.74.032302; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ANNIHILATION OPERATORS
BEAM SPLITTING
DATA TRANSMISSION
DISTRIBUTION
EFFICIENCY
EIGENSTATES
MIXED STATE
PROBABILITY
QUANTUM CRYPTOGRAPHY
SECRECY PROTECTION