Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1542780 | Optics Communications | 2006 | 4 Pages |
Abstract
We improve the quantum key distribution protocol proposed by Pereira et al. [S.F. Pereira, Z.Y. Ou, H.J. Kimble, Phys. Rev. A 62 (2000) 042311], by employing the second-order coherence of optical fields, which can be easy experimentally measured with a Hanbury-Brown and Twiss intensity interferometer. It is shown that eavesdropping can be directly detected without sacrificing extra secret bits as test key. The efficiency of the improved system is enhanced greatly, since no secret bit needs to be discarded.
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Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Jin Xiong, Guihua Zeng, Nanrun Zhou,