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arXiv 2203.09650quant-phphysics.optics
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纠缠光子对的相干背散射

Coherent Backscattering of Entangled Photon Pairs

Mamoon Safadi, Ohad Lib, Ho-Chun Lin, Chia Wei Hsu, Arthur Goetschy, Yaron Bromberg

AI总结:

本研究发现纠缠光子在动态复杂介质中多重散射后仍保持部分关联,并在实验和全波模拟中观察到由输运平均自由程决定的角范围内关联增强,揭示了其源于光子离开并虚重新注入样品的散射轨迹干涉,为复杂系统中的纠缠输运提供了新机遇。

摘要:

纠缠光子之间的关联是检验量子力学基本特性的关键要素,也是量子技术的宝贵资源。然而,动态介质中的散射通常会扰乱并平均掉这些关联。在此,我们展示了从动态复杂介质反射的多次散射纠缠光子仍保持部分关联。我们在实验和全波模拟中观察到了增强的关联,这种关联存在于由输运平均自由程决定的角范围内,并在 disorder averaging 中占主导。理论分析表明,这种增强源于散射轨迹之间的干涉,在这些轨迹中,光子离开样品随后又被虚重新注入回样品中。这些路径是导致经典光相干背散射路径的量子对应。这项工作指明了在复杂系统中尽管存在动态多重散射,仍能实现纠缠输运的机遇。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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