Burenkov I A, Jabir M V, Polyakov S V
National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.
Joint Quantum Institute and University of Maryland, College Park, Maryland 20742, USA.
AVS Quantum Sci. 2021;3(2). doi: 10.1116/5.0036959.
Communication is an integral part of human life. Today, optical pulses are the preferred information carriers for long-distance communication. The exponential growth in data leads to a "capacity crunch" in the underlying physical systems. One of the possible methods to deter the exponential growth of physical resources for communication is to use quantum, rather than classical measurement at the receiver. Quantum measurement improves the energy efficiency of optical communication protocols by enabling discrimination of optical coherent states with the discrimination error rate below the shot-noise limit. In this review article, the authors focus on quantum receivers that can be practically implemented at the current state of technology, first and foremost displacement-based receivers. The authors present the experimentalist view on the progress in quantum-enhanced receivers and discuss their potential.
通信是人类生活不可或缺的一部分。如今，光脉冲是长距离通信中首选的信息载体。数据的指数级增长导致基础物理系统出现“容量危机”。抑制通信物理资源指数级增长的一种可能方法是在接收器处使用量子测量而非经典测量。量子测量通过实现对光相干态的区分，且区分错误率低于散粒噪声极限，从而提高了光通信协议的能量效率。在这篇综述文章中，作者聚焦于在当前技术水平下可实际实现的量子接收器，首先是基于位移的接收器。作者展示了实验人员对量子增强接收器进展的看法，并讨论了它们的潜力。
