Filling gap of combination of gauge and analytical method in KFR-like theory  

作　　者：Jian Li Feng-Cai Ma 李健;马凤才(School of Physical Science and Technology,Inner Mongolia University,Hohhot 010021,China;Department of Science,Shenyang Aerospace University,Shenyang 110036,China;Department of Physics,Liaoning University,Shenyang 110036,China)

机构地区：[1]School of Physical Science and Technology,Inner Mongolia University,Hohhot 010021,China [2]Department of Science,Shenyang Aerospace University,Shenyang 110036,China [3]Department of Physics,Liaoning University,Shenyang 110036,China

出　　处：《Chinese Physics B》2020年第4期267-271,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.11274149 and 11304185);the Program of Shenyang Key Laboratory of Optoelectronic Materials and Technology,China(Grant No.F12-254-1-00)。

摘　　要：Bauer recently presented a formula for the ionization rate of a hydrogen atom in a strong linearly polarized laser field[J.Phys.B 49145601(2016)].He started from the Keldysh probability amplitude in the length gauge and utilized Reiss’s method in the velocity gauge.Instead,according to the Reiss probability amplitude in the velocity gauge and Keldysh’s derivation for the length gauge,we derive a formula for the ionization rate of a ground-state hydrogen atom or a hydrogenlike atom in a strong linearly polarized laser field.We compare the numerical results of the total ionization rate and the photoelectron energy distribution calculated from our formula with the results from Keldysh,Reiss,and Bauer.We find that the apparent discrepancies in the ionization rate are caused not only by different gauges,but also by different analytical methods used to derive the ionization rate.

关 键 词：VELOCITY GAUGE IONIZATION rate energy SPECTRA 

分 类 号：TN241[电子电信—物理电子学] O562[理学—原子与分子物理]