论文标题
rydberg敷料介导的Atom-Photon自旋交换碰撞
Atom-Photon Spin-Exchange Collisions Mediated by Rydberg Dressing
论文作者
论文摘要
我们表明，通过rydberg缝制的原子合奏传播的光子可以用单个原子交换其旋转状态。这种自旋交换碰撞表现出耗散性和相干特征，具体取决于相互作用强度。为了强烈的相互作用，碰撞用原子散发出系统将系统驱动到光子的纠缠黑暗状态。在弱相互作用方程中，散射在多光子输入脉冲中相干地翻转单个光子的自旋，表明了通用的单光子减法过程。对该过程的分析分析表明，提取的光子的效率和纯度之间的普遍权衡，该效率适用于广泛的单光子减法器。我们表明，可以通过在新型相匹配条件下调整散射速率来优化这种权衡。
We show that photons propagating through a Rydberg-dressed atomic ensemble can exchange its spin state with a single atom. Such a spin-exchange collision exhibits both dissipative and coherent features, depending on the interaction strength. For strong interaction, the collision dissipatively drives the system into an entangled dark state of the photon with an atom. In the weak interaction regime, the scattering coherently flips the spin of a single photon in the multi-photon input pulse, demonstrating a generic single-photon subtracting process. An analytic analysis of this process reveals a universal trade-off between efficiency and purity of the extracted photon, which applies to a wide class of single-photon subtractors. We show that such a trade-off can be optimized by adjusting the scattering rate under a novel phase-matching condition.
