Quantum communication with coherent states and linear optics
Quantum communication with coherent states and linear optics
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DOI：
10.1103/physreva.90.042335
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发表时间：
2014-10-29
影响因子：
2.9
通讯作者：
Luetkenhaus, Norbert
中科院分区：
文献类型：
--
作者：
Arrazola, Juan Miguel;Luetkenhaus, Norbert
我们介绍了一个通用的映射编码量子通信协议，涉及多个量子比特的纯态，酉变换，投影测量到另一组协议，采用光的相干态的光学模式，线性光学变换的线性组合，并与单光子阈值检测器的测量。这提供了一个通用框架，用于将量子通信中的协议转换为可以用当前技术实现的形式。我们探讨了原始量子比特协议和从映射中获得的相干态协议之间的相似性，并利用映射在量子通信复杂性和量子数字签名的背景下构建额外的协议。我们的结果有可能使广泛的量子通信协议更接近其实验演示。
We introduce a general mapping for encoding quantum communication protocols involving pure states of multiple qubits, unitary transformations, and projective measurements into another set of protocols that employ a coherent state of light in a linear combination of optical modes, linear-optics transformations, and measurements with single-photon threshold detectors. This provides a general framework for transforming protocols in quantum communication into a form in which they can be implemented with current technology. We explore the similarity between properties of the original qubit protocols and the coherent-state protocols obtained from the mapping and make use of the mapping to construct additional protocols in the context of quantum communication complexity and quantum digital signatures. Our results have the potential of bringing a wide class of quantum communication protocols closer to their experimental demonstration.