Parametric down-conversion with local operation and two-way classical communication

doi:10.1088/1674-1056/20/4/040303

Abstract The decoy-state quantum key distribution protocol suggested by Adachi et al. (Phys. Rev. Lett. 99 180503 (2007)) is proven to be secure and feasible with current techniques. It owns two attractive merits, i.e., its longer secure transmission distance and more convenient operation design. In this paper, we first improve the protocol with the aid of local operation and two-way classical communication (2-LOCC). After our modifications, the secure transmission distance is increased by about 20 km, which will make the protocol more practicable.

Keywords: parametric down-conversion local operation and two-way classical communication B step

Received: 01 October 2010
Revised: 09 November 2010
Accepted manuscript online:

PACS:	03.65.-w	(Quantum mechanics)
	03.67.-a	(Quantum information)

Fund: Project supported by the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 10905028/A050104), the Natural Science Foundation of Henan Province, China (Grant No. 092300410188), the Science Foundation of Hennan Provincial Education Department (Grant No. 2010A140010) and Youth Fund of Luoyang Normal College.

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Liu Qiang(刘强) and Tan Yong-Gang(谭勇刚) Parametric down-conversion with local operation and two-way classical communication 2011 Chin. Phys. B 20 040303

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