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- Title
Decoy-state quantum key distribution with biased basis choice.
- Authors
Zhengchao Wei; Weilong Wang; Zhen Zhang; Ming Gao; Zhi Ma; Xiongfeng Ma
- Abstract
We propose a quantum key distribution scheme that combines a biased basis choice with the decoy-state method. In this scheme, Alice sends all signal states in the Z basis and decoy states in theX and Z basis with certain probabilities, and Bob measures received pulses with optimal basis choice. This scheme simplifies the system and reduces the random number consumption. From the simulation result taking into account of statistical fluctuations, we find that in a typical experimental setup, the proposed scheme can increase the key rate by at least 45% comparing to the standard decoy-state scheme. In the postprocessing, we also apply a rigorous method to upper bound the phase error rate of the single-photon components of signal states.
- Subjects
QUANTUM mechanics; QUANTUM theory; MECHANICS (Physics); RANDOM numbers; STATISTICAL correlation
- Publication
Scientific Reports, 2013, p1
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/srep02453