Numerical analysis of decoy state quantum key distribution protocols

Details Numerical analysis of decoy state quantum key distribution protocols Numerical analysis of decoy state quantum key distribution protocols

2008-12-30

arxiv.org/abs/0901.0013v2

Physics

Quantum Physics

30 pages, 15 figures; v2: minor edits

Scientific paper

Decoy state protocols are a useful tool for many quantum key distribution systems implemented with weak coherent pulses, allowing significantly better secret bit rates and longer maximum distances. In this paper we present a method to numerically find optimal three-level protocols, and we examine how the secret bit rate and the optimized parameters are dependent on various system properties, such as session length, transmission loss, and visibility. Additionally, we show how to modify the decoy state analysis to handle partially distinguishable decoy states as well as uncertainty in the prepared intensities.

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