论文标题

通过模拟的湍流大气来塑造纠缠的光子

Shaping entangled photons through emulated turbulent atmosphere

论文作者

Shekel, Ronen, Lib, Ohad, Bromberg, Yaron, Sardas, Alon

论文摘要

大气湍流的散射是建立长自由空间光学链接,特别是纠缠光子的链接的主要挑战之一。由于固有的低信号与噪声比和纠缠的脆弱性,因此很难将经典补偿方法应用于纠缠光子。我们最近表明,我们可以使用明亮的激光束来泵送自发参数降低转换,以控制纠缠光子之间的空间相关性以补偿其散射。在这项工作中,我们应用泵塑料技术来补偿通过模拟大气湍流散射的纠缠光子之间的相关性。我们使用空间光调节器和Kolmogorov的湍流模型来模仿实验室中的大气湍流,并使用泵优化增强了15倍纠缠的光子信号。我们为静态和动态模拟大气展示了这一点,还证明了高阶模式散射的补偿。我们的结果可以打开与纠缠光子(例如量子密钥分布)中使用的纠缠光子的自由空间量子链接的大门。

Scattering by atmospheric turbulence is one of the main challenges in creating long free-space optical links, and specifically links of entangled photons. Classical compensation methods are hard to apply to entangled photons, due to inherently low signal to noise ratios and the fragility of entanglement. We have recently shown that we can use the bright laser beam that pumps spontaneous parametric down conversion to control the spatial correlations between entangled photons for compensating their scattering. In this work, we apply the pump-shaping technique to compensate for scrambling of correlations between entangled photons that scatter by emulated atmospheric turbulence. We use a spatial light modulator and Kolmogorov's turbulence model to emulate atmospheric turbulence in the lab, and enhance the entangled photons' signal by a factor of fifteen using pump optimization. We show this for both static and dynamic emulated atmosphere, and demonstrate also the compensation of the scattering of a higher-order mode. Our results can open the door towards realizing free-space quantum links with entangled photons, used in applications such as quantum key distribution.

扫码加入交流群

加入微信交流群

微信交流群二维码

扫码加入学术交流群,获取更多资源