标题： 集成光学量子存储器的量子密码学 显示英文标题

标题： Quantum cryptography integrating an optical quantum memory

摘要： 可扩展量子网络的发展在很大程度上依赖于光学量子存储器，这些存储器是实现量子信息存储的关键组件。 这些存储器在纠缠分发和长距离量子通信中起着至关重要的作用，在这方面已经取得了显著进展。 然而，光学存储器有着更广泛的应用，其存储和缓冲能力可以造福未来多种量子技术。 在这里，我们展示了第一个包含中间量子存储层的密码协议演示。 具体来说，我们实现了威斯纳不可伪造的量子货币原语，并引入了一个存储步骤，而不是在线程序。 该协议对存储效率和噪声水平提出了严格要求，以达到安全状态。 我们通过光的偏振编码弱相干态以及基于高效冷原子的量子存储器来演示此方案，并验证了整个过程。 我们的结果展示了一项重大能力，为量子存储器的利用和网络功能开辟了新的途径。 显示英文摘要

摘要： Developments in scalable quantum networks rely critically on optical quantum memories, which are key components enabling the storage of quantum information. These memories play a pivotal role for entanglement distribution and long-distance quantum communication, with remarkable advances achieved in this context. However, optical memories have broader applications, and their storage and buffering capabilities can benefit a wide range of future quantum technologies. Here we present the first demonstration of a cryptography protocol incorporating an intermediate quantum memory layer. Specifically, we implement Wiesner's unforgeable quantum money primitive with a storage step, rather than as an on-the-fly procedure. This protocol imposes stringent requirements on storage efficiency and noise level to reach a secure regime. We demonstrate the implementation with polarization encoding of weak coherent states of light and a high-efficiency cold-atom-based quantum memory, and validate the full scheme. Our results showcase a major capability, opening new avenues for quantum memory utilization and network functionalities.