Abstract

Within the framework of a non-stationary scattering theory formulas for electron scattering cross sections on an arbitrary time-periodic potential are derived. These formulas to a weakly ionized ultracold Rydberg plasma subjected to a perturbation by a terahertz acoustic wave and a laser field are applied. Our result for laser-assisted electron-atom scattering generalizes the Kroll-Watson formula to the case of an elliptically polarized electromagnetic wave. Based on the kinetic approach we discuss a mechanism of the scattering of plasma charges on neutral atoms, vibrating in the field of the external acoustic wave, leading to a renormalization of the electron plasma frequency. Additionally, within the framework of the hydrodynamic approach, we demonstrate the possibility of a parametric resonance amplification of electron and ion density oscillations in weakly ionized two component ultracold Rydberg plasmas under the influence of a laser field and as high-frequency acoustic wave.

Graphic abstract

中文翻译：

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受太赫兹声波扰动的超冷里德堡等离子体的非平稳散射理论和参数共振

摘要

在非平稳散射理论的框架内，推导出了任意时间周期电位上的电子散射截面的公式。这些公式适用于受到太赫兹声波和激光场扰动的弱电离超冷里德堡等离子体。我们的激光辅助电子原子散射结果将 Kroll-Watson 公式推广到椭圆极化电磁波的情况。基于动力学方法，我们讨论了等离子体电荷在中性原子上的散射机制，在外部声波场中振动，导致电子等离子体频率重整化。此外，在流体动力学方法的框架内，

图形摘要