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arXiv quant-ph/0411183quant-ph
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利用光子对位置和动量的量子密钥分发的实验研究

Experimental investigation of quantum key distribution with position and momentum of photon pairs

M. P. Almeida, S. P. Walborn, P. H. Souto Ribeiro

摘要:

研究了参量下转换光子对位置和动量的Einstein-Podolsky-Rosen关联在安全量子密钥分发协议实现中的应用.我们表明,安全性是由下变频对之间的纠缠保证,可以通过直接比较Alice和Bob的测量结果或评估Mancini等人提出的不等式来检查。88,120401(2002))。

英文摘要:

We investigate the utility of Einstein-Podolsky-Rosen correlations of the position and momentum of photon pairs from parametric down-conversion in the implementation of a secure quantum key distribution protocol. We show that security is guaranteed by the entanglement between downconverted pairs, and can be checked by either direct comparison of Alice and Bob's measurement results or evaluation of an inequality of the sort proposed by Mancini et al. (Phys. Rev. Lett. 88, 120401 (2002)).

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