通过单个量子信道进行经典数据与连续变量纠缠的共传输
Co-transmission of classical data and continuous-variable entanglement over a single quantum channel
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中文总结 AI 辅助
研究如何通过应用特定经典调制量子通信协议，实现经典数据与连续变量纠缠在单个量子信道的共传输，表征纠缠态质量，适用于中继器网络，还计算了点对点高斯CMQC方案密钥生成率并与SQCC协议比较。
中文摘要 AI 辅助
最初提出的基于位移的同步量子-经典通信（SQCC）协议通常与大多数有用的量子通信方案不兼容，如纠缠分发或基于中继器的量子密钥分发：对经典信号的直接测量也会测量并破坏量子态，使得点对点高斯量子密钥分发成为唯一适合与SQCC集成的量子通信方案。在这项工作中，我们应用Zaunders和Ralph提出的经典调制量子通信协议[arXiv:2606.03181v3]来解决这个问题，并演示连续变量高斯纠缠与经典信息的同时分发。我们表征了分发的纠缠态的质量，并概述了该方案如何适用于基于中继器的网络。最后，我们计算了点对点情况下高斯CMQC方案的密钥生成率，并将其与等效的点对点SQCC协议进行比较。
英文摘要
Displacement-based simultaneous quantum-classical communications (SQCC) protocols, as originally proposed, are generally incompatible with the majority of useful quantum communication schemes, such as entanglement distribution or repeater-based quantum key distribution: direct measurement of the classical signal also measures and destroys the quantum state, leaving point-to-point Gaussian quantum key distribution as the only quantum communication scheme amenable to integration with SQCC. In this work, we apply the classically-modulated quantum communication protocol proposed by Zaunders and Ralph [arXiv:2606.03181v3] to circumvent this issue and demonstrate the distribution of continuous-variable Gaussian entanglement simultaneously with classical information. We characterise the quality of the distributed entangled state and outline how the scheme is suitable for use in repeater-based networks. Lastly, we compute the secret key generation rate of the Gaussian CMQC scheme in the point-to-point case and compare it to the equivalent point-to-point SQCC protocol.
