论文标题
量子远程状态的非古典准备
Nonclassical Preparation of Quantum Remote States
论文作者
论文摘要
远程状态准备（RSP）使发件人无需发送状态本身即可远程准备接收器的量子状态。最近，人们认识到量子不和谐是RSP的必要资源。在这里，我们从理论上和实验研究RSP是否可以胜过动态经典远程状态准备过程。我们表明，这样的经典过程可以描述由量子不和谐驱动的某些RSP。相反，我们认为，用于动态过程的一种新型的Einstein-Podolsky-Rosen转向，称为量子过程转向，是执行非经典RSP所需的资源。我们通过实验实现光子量子系统的非经典RSP来展示如何测量量子过程转向。此外，我们演示了从经典RSP到量子RSP的过渡。我们的结果还具有实现真正支持量子工程的真正量子RSP的应用。
Remote state preparation (RSP) enables a sender to remotely prepare the quantum state of a receiver without sending the state itself. Recently, it has been recognized that quantum discord is a necessary resource for RSP. Here, we theoretically and experimentally investigate whether RSP can outperform dynamic classical remote state preparation processes. We show that such classical processes can describe certain RSPs powered by quantum discord. Rather, we argue that a new kind of Einstein-Podolsky-Rosen steering for dynamical processes, called quantum process steering, is the resource required for performing nonclassical RSP. We show how to measure quantum process steering by experimentally realizing nonclassical RSP of photonic quantum systems. Moreover, we demonstrate the transition from classical to quantum RSP. Our results also have applications in realizing genuine quantum RSP for quantum-enabled engineering.
