论文标题
在相扩散噪声下，原子间接测量和稳健的二进制量子通信
Atomic indirect measurement and robust binary quantum communication under phase-diffusion noise
论文作者
论文摘要
众所周知，基于Jaynes-Cummings模型的原子间接测量值可以提出超过射击噪声极限的新型量子通信协议。此外，与理想的连贯状态传输消息时，与原子间接测量的量子通信几乎可以达到HELSTROM结合以及可访问的信息。在这里，我们表明原子间接测量对相扩散噪声是可靠的。通过考虑区分接收信号的误差概率，我们表明原子间接测量也几乎可以达到HELSTROM结合以及可访问的信息，甚至通道都暴露于相扩散的噪声。此外，我们进一步表明，当相位扩散通道的标准偏差不太大时，原子间接测量的表现由光子数解析检测器和最大 - 最高决定规则组成的反馈分割的接收器的表现不高。
It was known that a novel quantum communication protocol surpassing the shot noise limit can be proposed by an atomic indirect measurement based on the Jaynes-Cummings model. Moreover, the quantum communication with the atomic indirect measurement can nearly achieve the Helstrom bound as well as the accessible information when message is transmitted by an ideal coherent state. Here, we show that the atomic indirect measurement is robust against the phase-diffusion noise. By considering the error probability of discriminating received signal, we show that the atomic indirect measurement can also nearly achieve the Helstrom bound as well as the accessible information even the channel is exposed to the phase-diffused noise. Moreover, we further show that atomic indirect measurement outperforms the feedback-excluded receiver composed of a photon number resolving detector and maximum-a-posteriori decision rule when the standard deviation of the phase-diffusion channel is not too large.
