论文标题
新兴量子网络的量子路由
Quantum Routing for Emerging Quantum Networks
论文作者
论文摘要
量子路由,在多个输出路径上的输入量子信号的纠缠将是未来量子网络的重要方面。通过目前正在开发的嘈杂量子设备在新兴量子网络中实施此类路由是一种明显的可能性。量子误差校正(适用于路由过程中经历的任意噪声量子通道)将需要。在这项工作中,我们设计了一个合并的电路,用于量子路由和量子误差校正,并在嘈杂的现实世界量子设备上首次实现了此类电路。在该通道上的统计知识的假设下,我们通过通过量子状态层析成像来确定路径键入的量子验证量路由的量子性质,还测量了其成功的可能性。部署的量子误差校正在改善路由方面被确定为成功。我们的实验首次验证了近期噪声量子计算设备中错误校正的量子路由是可行的,我们的详细结果为所有近期量子硬件提供了一个量子布线基准。
Quantum routing, the entanglement of an input quantum signal over multiple output paths, will be an important aspect of future quantum networks. Implementation of such routing in emerging quantum networks via the noisy quantum devices currently under development is a distinct possibility. Quantum error correction, suitable for the arbitrary noisy quantum channels experienced in the routing process, will be required. In this work, we design a combined circuit for quantum routing and quantum error correction, and carry out the first implementation of such a circuit on a noisy real-world quantum device. Under the assumption of statistical knowledge on the channel, we experimentally verify the quantum nature of the error-corrected quantum routing by determining the path-entanglement through quantum state tomography, measuring also its probability of success. The quantum error correction deployed is identified as successful in terms of improving the routing. Our experiments validate, for the first time, that error-corrected quantum routing in near-term noisy quantum-computing devices is feasible, and our detailed results provide a quantum-routing benchmark for all near-term quantum hardware.