AI 中文总结
研究利用量子关联对回流进行非局域操控，通过对纠缠光子局部测量来调控相关路径，结合弱测量可视化操控过程，还揭示了操控中与距离相关的资源需求，展现了量子关联在操控传输动力学及非接触操控方面的作用。
AI 中文摘要
量子关联是量子信息处理的核心资源，但其对动力学传输过程的操控能力很大程度上尚未被探索。本文通过回流这一独特的干涉现象进行研究，其中局部概率流沿与动量方向相反的方向传播。我们报道了首次使用偏振路径纠缠光子在双缝干涉中对回流进行非局域操控。通过对一个光子进行局部测量，远程设计与其伙伴相关的两条路径的相对振幅和相位，在不直接访问干涉系统的情况下操控回流的出现、空间分布和传播动力学。结合弱测量提取横向动量并重建玻姆轨迹，我们以单像素空间分辨率直接可视化了操控过程。此外，使用具有可调关联强度的维纳态，我们揭示了非局域回流操控中与距离相关的资源需求：诱导回流所需的最小关联强度随传播距离增加，从纠缠到EPR引导，最终到贝尔非局域性。我们的结果表明量子关联是操控传输动力学的操作资源，并为非接触操控脆弱或难以接近的系统开辟了新途径。
英文摘要
Quantum correlations are central resources for quantum information processing, yet their ability to manipulate dynamical transmission processes remains largely unexplored. Here, we investigate this ability through backflow, a uniquely interference phenomenon in which local probability flow propagates opposite to the momentum direction. We report the first nonlocal manipulation of backflow in double-slit interference using polarization-path-entangled photons. By performing local measurements on one photon, we remotely engineer the relative amplitude and phase of the two paths associated with its partner, manipulating the emergence, spatial distribution, and propagation dynamics of backflow without directly accessing the interfering system. Combining weak measurements to extract the transverse momentum and reconstruct Bohmian trajectories, we provide a direct visualization of the manipulation process with single-pixel spatial resolution. Furthermore, using Werner states with tunable correlation strengths, we reveal a distance-dependent resource requirement for nonlocal backflow manipulation: the minimum correlation strength required to induce backflow increases with propagation distance, progressing from entanglement to EPR-steering and ultimately Bell nonlocality. Our results show quantum correlations as operational resources for manipulating transmission dynamics and open new avenues for non-contact manipulation of fragile or inaccessible systems.
Comments15pages,10figures
