Rydberg electrons in laser fields: A finite-range-interaction problem.
Rydberg electrons in laser fields: A finite-range-interaction problem.
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激光场中的里德伯电子：有限范围相互作用问题。
DOI：
10.1103/physreva.36.5178
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发表时间：
1987
期刊：
影响因子：
--
通讯作者：
Zoller
中科院分区：
文献类型：
--
作者：
Giusti;Zoller
基于激光辐射效应可描述为耦合库仑型碎裂通道的有限体积相互作用，发展了强激光场里德堡和连续态理论。具体地说，激光诱导耦合可以结合到多通道量子缺陷处理中，其中定义了一组与不同光子数相对应的修饰通道，具有依赖于强度和混合角度的量子缺陷。这些量可以通过求解电子波函数的紧耦合方程组来获得，在渐近电子振荡消失的坐标系中。这使我们能够在有限距离上读出辐射反应矩阵，它是能量的平滑函数，能量范围比光子频率小，并且包含辐射耦合的净效应。对圆偏振激光中氢S态的电离进行了计算，并考虑了阈值以上的光子吸收。
A theory of Rydberg and continuum states in intense laser fields is developed based on the observation that the effect of laser radiation can be described in a scattering formulation as a finite-volume interaction coupling Coulomb-type fragmentation channels. In particular, laser-induced couplings may be incorporated in a multichannel quantum-defect treatment, in which a set of dressed channels corresponding to different photon numbers is defined, with intensity-dependent quantum defects and mixing angles. These quantities may be obtained by solving a system of close-coupling equations for the electron wave function, in a frame where the asymptotic electron oscillations are transformed away. This allows us to read off at a finite distance a radiative reaction matrix, which is a smooth function of energy for an energy range small compared with the photon frequency, and contains the net effect of radiative couplings. Calculations are presented for ionization of hydrogen s states in circularly polarized laser light, with allowance for above-threshold photon absorption.