On the detection of closed orbits in time-dependent systems by using double-pulse lasers

作     者：S U Khan M L Du S U Khan;M L Du

作者机构：Institute of Theoretical PhysicsChinese Academy of Sciences.Beijing 100190China University of Chinese Academy of SciencesBeijing100049China 

出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)

年 卷 期：2020年第72卷第9期

页      面：111-117页

核心收录：

学科分类：07[理学] 070203[理学-原子与分子物理] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：the CAS-TWAS president fellowship program of UCAS for financial assistance partial support by the National Natural Science Foundation of China (NSFC), grants No. 11 474 079 and No. 11 421 063。 

主　　题：double-pulse laser detection of closed orbits photodetachment spectra time-dependent systems 

摘      要：In the photodetachment of atoms or negative ions by a double-pulse laser, the first pulse of the double-pulse laser generates waves and the delayed second pulse may detect them. The phenomenon of the excitation and detection of waves by a double-pulse laser can be used to identify the closed orbits in the system. We demonstrate this phenomenon with a negative hydrogen ion(H^-) by analyzing the total population excited by a double-pulse laser in a timedependent field for different physical parameters. By analyzing the total excited population using a double-pulse laser, we can uncover all the closed orbits existing in the system. We demonstrate that this can be realized by scanning the first pulse position and the time delay between the two pulses.