In this paper, we discuss temporal optical phenomena in a gas of Rydberg atoms, which can take place in the presence of varying quasi-static electric fields and control laser beams. This includes the discussion of spectral changes of probe laser beams, associated with purely temporal processes created by Stark and ac-Stark shifts of the atomic susceptibility. Such changes include phase and group velocity perturbations, time delays, frequency shifts, and other temporal changes of the transmitted and reflected probe signals. We mainly focus on ultrafast temporal transitions, known as time-refraction, and their specific signatures, which envolve the occurrence of a temporally induced reflection coefficient. Our model assumes that the temporal variations of the applied Stark shifts are much shorter than the Rydberg life-times. We also discuss the optical properties of a temporally perturbed Rydberg-EIT configuration, and the expected influence of dipole blockade. This could eventual...

中文翻译：

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里德堡气体中的时间光学过程

在本文中，我们讨论了Rydberg原子气体中的时间光学现象，该现象可以在存在变化的准静态电场和控制激光束的情况下发生。这包括讨论探测激光束的光谱变化，该变化与由Stark和原子磁化率的ac-Stark位移产生的纯时间过程有关。这样的变化包括相位和群速度的扰动，时间延迟，频率偏移以及发射和反射的探测信号的其他时间变化。我们主要关注被称为时间折射的超快速时间转变及其特定特征，这些特征涉及时间感应反射系数的发生。我们的模型假设所应用的史塔克频移的时间变化比里德伯格的寿命短得多。我们还讨论了暂时受扰的Rydberg-EIT配置的光学特性，以及偶极子阻断的预期影响。最终可能会...