The microscopic recollision dynamics in strong-field nonsequential double ionization of Ar atoms is in- vestigated using three-dimensional classical ensembles. By adjusting the nuclear Coulomb potential, we can excell...The microscopic recollision dynamics in strong-field nonsequential double ionization of Ar atoms is in- vestigated using three-dimensional classical ensembles. By adjusting the nuclear Coulomb potential, we can excellently reproduce the experimental results both within the laser intensity regimes well above the reeollision threshold and well below the recollision threshold quantitatively. More importantly, our trajectory analysis clearly reveals the particular electronic dynamics in recollision process： the momentum of the recolliding electron encounters a sudden change both in magnitude and in direction when it approaches the nucleus closely, which show that the nuclear Coulomb attraction plays a key role in the recollision process of nonsequential double ionization of Ar atoms.展开更多
本文在平稳和非平稳情形,构造了两指标时间序列的一类预报方法。在平稳条件下构造了两指标 AR 过程的最佳线性预报。在非平稳情形,利用单指标时间序列的新息预报思想,首先将非平稳过程的自回归系数看作是一个新的两指标多维平稳过程加...本文在平稳和非平稳情形,构造了两指标时间序列的一类预报方法。在平稳条件下构造了两指标 AR 过程的最佳线性预报。在非平稳情形,利用单指标时间序列的新息预报思想,首先将非平稳过程的自回归系数看作是一个新的两指标多维平稳过程加以预报,然后再对非平稳过程本身做最佳线性预报。展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos. 11005088 and 11047145the Science & Technology Project of Henan Province in China under Grant Nos. 102300410241 and 112300410021the Scientific Research Foundation of Education Department of Henan Province in China under Grant Nos. 2009A140006 and 2011B140018
文摘The microscopic recollision dynamics in strong-field nonsequential double ionization of Ar atoms is in- vestigated using three-dimensional classical ensembles. By adjusting the nuclear Coulomb potential, we can excellently reproduce the experimental results both within the laser intensity regimes well above the reeollision threshold and well below the recollision threshold quantitatively. More importantly, our trajectory analysis clearly reveals the particular electronic dynamics in recollision process： the momentum of the recolliding electron encounters a sudden change both in magnitude and in direction when it approaches the nucleus closely, which show that the nuclear Coulomb attraction plays a key role in the recollision process of nonsequential double ionization of Ar atoms.
