From quantum cloning to quantum key distribution with continuous variables: a review (Invited)
From quantum cloning to quantum key distribution with continuous variables: a review (Invited)
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DOI：
10.1364/josab.24.000324
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发表时间：
2007-02
影响因子：
1.9
通讯作者：
N. Cerf;P. Grangier
中科院分区：
文献类型：
--
作者：
N. Cerf;P. Grangier
连续变量量子信息处理是一种在过去几年中引起越来越大兴趣的范例，部分原因是基于标准光通信组件的高速率量子通信系统的前景。在这篇综述文章中，我们介绍了光学中量子连续变量的概念，然后转向克隆连续变量光态的基本不可能性，这是量子密钥分发的核心结果。然后介绍了基于连续变量的最新量子密钥分发系统，重点介绍了基于高斯调制相干态的量子密钥分发协议，并重点介绍了目前这些系统的实验演示。最后，我们简要回顾了这些密码协议的最新安全证明。
Quantum information processing with continuous variables is a paradigm that has attracted a growing interest over the past years, partly as a consequence of the prospects for high-rate quantum communication systems based on standard optical telecommunication components. In this overview article, we introduce the concept of quantum continuous variables in optics and then turn to the fundamental impossibility of cloning continuous-variable light states, a result that lies at the heart of quantum key distribution. Then we present state-of-the-art quantum key distribution systems relying on continuous variables, focusing mainly on the protocols using Gaussian-modulated coherent light states and emphasizing the current experimental demonstration of these systems. Finally, we briefly review recent security proofs of these cryptographic protocols.