Three-Channel Interference Interpretation of Fano Profile  

作　　者：李波 李天钧 马子茹 王希源 黄新朝 朱林繁 Bo Li;Tian-Jun Li;Zi-Ru Ma;Xi-Yuan Wang;Xin-Chao Huang;Lin-Fan Zhu(Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China;European XFEL,Holzkoppel 4,22869 Schenefeld,Germany)

机构地区：[1]Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China [2]European XFEL,Holzkoppel 4,22869 Schenefeld,Germany

出　　处：《Chinese Physics Letters》2024年第5期30-34,共5页中国物理快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No. 12334010)。

摘　　要：Fano resonance is a ubiquitous phenomenon, and it is commonly interpreted as a two-channel interference of the discrete and continuous channels. The present work investigates the Fano profile from a perspective of the temporal evolution of the wave function. By exciting the atom with a δ pulse and calculating the evolution of the wave function, the Fano formula is deduced. The results clearly show that the Fano resonance is of a three-channel interference, which is different from the traditional understanding. The three channels are revealed as the groundcontinuum, ground-discrete-continuum, and a previously unmentioned third channel, i.e., ground-continuumdiscrete-continuum. The present three-channel interpretation can be easily generalized to other physical systems,contributing to a deeper understanding of the Fano profile.

关 键 词：FUNCTION PROFILE CONTINUUM 

分 类 号：O56[理学—原子与分子物理]