论文标题
基于卫星的混合纠缠分布
Satellite-based Distribution of Hybrid Entanglement
论文作者
论文摘要
随着全球量子通信的成熟，由混合技术 - 连续变量（CV）和离散变量（DV）组成的异质量子网络将变得无处不在。简历和DV模式之间的混合量子键入将是此类网络中的关键资源。这种混合量子纠缠的领先候选者是Schrödinger-cat状态和光子数状态之间。在这项工作中，我们探讨了从卫星分布的两种模式挤压真空（TMSV）状态，作为在陆地量子网络中预先存储的候选杂种纠缠重新分布的传送资源。除了量化相对于CV模式，通过TMSV资源传送在哪些损失条件下，通过TMSV资源的传送效果优于混合纠缠的直接 - 卫星分布。我们的详细计算表明，在低地球轨道预期的损失条件下，通过TMSV资源的DV传送将始终提供明显改善的结果，相对于在异质量子网络中分布混合纠缠的其他方式。
Heterogeneous quantum networks consisting of mixed-technologies - Continuous Variable (CV) and Discrete Variable (DV) - will become ubiquitous as global quantum communication matures. Hybrid quantum-entanglement between CV and DV modes will be a critical resource in such networks. A leading candidate for such hybrid quantum entanglement is that between Schrödinger-cat states and photon-number states. In this work, we explore the use of Two-Mode Squeezed Vacuum (TMSV) states, distributed from satellites, as a teleportation resource for the re-distribution of our candidate hybrid entanglement pre-stored within terrestrial quantum networks. We determine the loss conditions under which teleportation via the TMSV resource outperforms direct-satellite distribution of the hybrid entanglement, in addition to quantifying the advantage of teleporting the DV mode relative to the CV mode. Our detailed calculations show that under the loss conditions anticipated from Low-Earth-Orbit, DV teleportation via the TMSV resource will always provide for significantly improved outcomes, relative to other means for distributing hybrid entanglement within heterogeneous quantum networks.
