Discrete Rotational Symmetry and Quantum Key Distribution Protocols

Details Discrete Rotational Symmetry and Quantum Key Distribution Protocols Discrete Rotational Symmetry and Quantum Key Distribution Protocols

2006-04-27

arxiv.org/abs/quant-ph/0604198v3

Phys. Rev. A 75, 032341 (2007)

Physics

Quantum Physics

7 pages

Scientific paper

10.1103/PhysRevA.75.032341

We study the role of discrete rotational symmetry in quantum key distribution by generalizing the well-known Bennett-Brassard 1984 (BB84) and Scarani-Acin-Ribordy-Gisin 2004 (SARG04) protocols. We observe that discrete rotational symmetry results in the protocol's invariance to continuous rotations, thus leading to a simplified relation between bit and phase error rates and consequently a straightforward security proof.

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