Author： Ren M. Wu G. Wu E. Zeng H.
Publisher： MAIK Nauka/Interperiodica
ISSN： 1054-660X
Source： Laser Physics, Vol.21, Iss.4, 2011-04, pp. : 755-760
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Abstract
Counterfactual quantum key distribution provides natural advantage against the eavesdropping on the actual signal particles. It can prevent the photon-number-splitting attack when a weak coherent light source is used for the practical implementation. We experimentally realized the counterfactual quantum key distribution in an unbalanced Mach-Zehnder interferometer of 12.5-km-long quantum channel with a high-fringe visibility of 97.4%. According to the security analysis, the system was robust against the photon-number-splitting attack. The article is published in the original.
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