线偏振激光场中Kramers-Henneberger原子本征态的研究  

Research on Eigenstates of Kramers-Henneberger Atoms in Linearly Polarized Laser Field

作　　者：杨小丹 徐修奕 魏启[1] Yang Xiaodan;Xu Xiuyi;Wei Qi(State Key Laboratory of Precision Spectroscopy,East China Normal University,Shanghai 200241,China)

机构地区：[1]华东师范大学精密光谱科学与技术国家重点实验室,上海200241

出　　处：《光学学报》2021年第17期152-157,共6页Acta Optica Sinica

基　　金：国家自然科学基金(11974113,11674098)。

摘　　要：在非微扰理论框架内,研究了在线偏振高频强激光场中具有σg和σu对称性的Kramers-Henneberger(KH)氢原子的本征态。该理论预测,在高频极限下,电子结构由一个包含"缀饰"库仑势且与时间无关的薛定谔方程决定。采用一组全新的基组来求解该结构方程,并且将计算结果与已有研究结果进行了比较。对于低能级本征态,尤其是基态(1s),所提方法的计算结果是精确的。但对于激发态,只有当激光强度较高时,所提方法的计算结果才是精确的。另外,还研究了KH氢原子的本征态结构。当激光强度很高时,除了低能级本征态呈现出"二分"结构之外,高能级本征态还呈现出"多分"结构。We study the eigenstates of Kramers-Henneberger(KH)hydrogen atom withσg andσu symmetries in a linearly polarized high-frequency strong laser field,within the framework of the nonperturbative theory.The theory predicts that within high-frequency limit,electric structure is determined by a time-independent Schr9 dinger equation containing a"dressed"Coulomb potential.We use a new basis set to solve the structure equation and compare our calculation results with existing research results.Our results are accurate for low-level eigenstates especially the ground state(1 s).But for excited states,our results are accurate only when the laser intensity is high.Furthermore,we also study the eigenstate structures of KH hydrogen atom.We find when the laser intensity is high,not only the low-level eigenstates exhibit the"dichotomy"structures,but also the high-level eigenstates display"muti-lobe"structures.

关 键 词：量子光学 Kramers-Henneberger原子 强激光场 高频弗洛凯理论 量子态 

分 类 号：O436[机械工程—光学工程]