论文标题
纠缠光子对的相干反向散射
Coherent Backscattering of Entangled Photon Pairs
论文作者
论文摘要
纠缠光子之间的相关性是测试量子力学基本方面和量子技术的宝贵资源的关键要素。但是，从动态介质中散射通常会争夺和平均此类相关性。在这里，我们表明，反射从动态复杂介质反射的乘形成纠缠的光子保持部分相关。我们在实验和全波模拟中观察到在由传输平均自由路径确定的角度范围内的增强相关性，这是平均的。理论分析表明，这种增强源于散射轨迹之间的干扰，其中光子离开样品，然后实际上将其重新注入其中。这些路径是导致经典光的相干反向散射的路径的量子对应物。这项工作表明，尽管复杂系统中的多重散射动态散射，但纠缠运输的机会。
Correlations between entangled photons are a key ingredient for testing fundamental aspects of quantum mechanics and an invaluable resource for quantum technologies. However, scattering from a dynamic medium typically scrambles and averages out such correlations. Here we show that multiply-scattered entangled photons reflected from a dynamic complex medium remain partially correlated. We observe in experiments and in full-wave simulations enhanced correlations, within an angular range determined by the transport mean free path, which prevail disorder averaging. Theoretical analysis reveals that this enhancement arises from the interference between scattering trajectories, in which the photons leave the sample and are then virtually reinjected back into it. These paths are the quantum counterpart of the paths that lead to the coherent backscattering of classical light. This work points to opportunities for entanglement transport despite dynamic multiple scattering in complex systems.
