你所需要的只是普适关联检测器：一种统一量子信道通信协议的方法
All you need is the universal correlation detector: A unified approach to universalize communication protocols over quantum channels
浏览论文内容
中文总结 AI 辅助
本研究提出普适关联检测器作为统一构建块，无需完整状态或信道知识即可构建达到容量的一阶最优量子通信协议，为未知量子信道上的协议设计提供系统化统一途径。
中文摘要 AI 辅助
在没有关于底层状态或信道的完整知识的情况下构建最优量子信息协议是一个核心挑战。我们通过开发普适关联检测作为量子通信的通用构建块来应对这一挑战。我们的检测器能够区分双体态与其边缘态的乘积，并且达到与利用完整状态信息构建的最优测试相同的一阶渐近性能。对于一般的双体量子态，仅知道一个边缘态就足够了：仅依赖于该边缘态的检测器对于每个兼容态都是一阶最优的。对于经典-量子态，检测器是完全普适的，不需要任何先验状态信息。通过将这些检测器与基于位置的解码和凸分裂相结合，我们构建了信道无关的编码方案，这些方案能够在一系列通信任务中达到容量。这些结果将普适关联检测转变为普适协议设计的系统性工具，为在许多未知量子信道上的通信任务设计达到容量的协议提供了一条统一途径。
英文摘要
Constructing optimal quantum information protocols without complete knowledge of the underlying states or channels is a central challenge. We address this challenge by developing universal correlation detection as a common building block for quantum communication. Our detectors distinguish a bipartite state from the product of its marginals and attain the same first-order asymptotic performance as optimal tests constructed with complete state information. For general bipartite quantum states, knowledge of a single marginal suffices: a detector depending only on that marginal is first-order optimal for every compatible state. For classical-quantum states, the detector is fully universal and requires no prior state information. By combining these detectors with position-based decoding and convex splitting, we construct channel-independent coding schemes that achieve capacity for a range of communication tasks. These results turn universal correlation detection into a systematic tool for universal protocol design, providing a unified route to designing capacity-achieving protocols for many communication tasks over unknown quantum channels.
发表机构
- The University of Tokyo（东京大学）
- RIKEN Center for Quantum Computing (RQC)（理化学研究所量子计算中心）
机构由 AI 辅助整理，请以论文原文为准。
