论文标题
使用预共享纠缠的通信能力的无限增强
Infinite-fold enhancement in communications capacity using pre-shared entanglement
论文作者
论文摘要
预共享的纠缠可以显着提高高热噪声和低亮度发射器的沟通速率。在此制度中，纠缠辅助能力与孔波容量之间的比率，量子力学允许的最大可靠通信率，而没有任何预共享的纠缠作为资源，可以扩展为$ \ log log（1/n_s）$，其中$ n_s \ ll 1 $是平均发送光子的光子光子数量。通过利用量子互联网发行的前共享的光频纠缠，例如，通过利用预共享的光学频率纠缠，可以大大提升弱变形设备的射频通信，这是尤其有希望的。在本文中，我们提出了一种量子发射器和接收器的结构化设计，该设计利用下调源可以连续变化的预共享纠缠，这可以利用这种声称的无限折叠容量增强，这是十多个问题的问题。最后，讨论了这种结果对在秘密通信的众所周知的{\ em square-root law}中破坏秘密通信的含义，并在预先共享的纠缠援助中进行了讨论。
Pre-shared entanglement can significantly boost communication rates in the regime of high thermal noise, and a low-brightness transmitter. In this regime, the ratio between the entanglement-assisted capacity and the Holevo capacity, the maximum reliable-communication rate permitted by quantum mechanics without any pre-shared entanglement as a resource, is known to scale as $\log(1/N_S)$, where $N_S \ll 1$ is the mean transmitted photon number per mode. This is especially promising in enabling a large boost to radio-frequency communications in the weak-transmit-power regime, by exploiting pre-shared optical-frequency entanglement, e.g., distributed by the quantum internet. In this paper, we propose a structured design of a quantum transmitter and receiver that leverages continuous-variable pre-shared entanglement from a downconversion source, which can harness this purported infinite-fold capacity enhancement---a problem open for over a decade. Finally, the implication of this result to the breaking of the well-known {\em square-root law} for covert communications, with pre-shared entanglement assistance, is discussed.
