Pereira Daniel, Almeida Margarida, Facão Margarida, Pinto Armando N, Silva Nuno A
Opt Lett. 2022 Aug 1;47(15):3948-3951. doi: 10.1364/OL.456333.
In this Letter we present a discrete modulated, continuous variables quantum key distribution implementation using two probabilistically shaped, 128-symbol, amplitude and phase shift keying constellations. At Bob's detection side, a polarization diverse, true heterodyne receiver architecture is implemented for symbol recovery. We demonstrate experimentally that our system is capable of achieving security against collective attacks, while using accessible, telecom-grade material, and of functioning for an indefinitely long period of time at distances in excess of 185 km, in the asymptotic regime.
在本信函中，我们展示了一种离散调制、连续变量量子密钥分发实现方案，该方案使用了两个概率整形的、128 符号的幅度和相位 shift 键控星座图。在鲍勃的检测端，实现了一种偏振分集、真正的外差式接收机架构用于符号恢复。我们通过实验证明，我们的系统能够在使用可获取的电信级材料的情况下，实现抵御集体攻击的安全性，并且在渐近区域中，能够在超过 185 公里的距离上无限期运行。
