Subluminal and Superluminal Phenomena in a Four-Level Atom  

作　　者：HAN Ding-An ZENG Ya-Guang CAO Hui 

机构地区：[1]Physics Department, Foshan University, Foshan 528000, China

出　　处：《Communications in Theoretical Physics》2008年第7期197-200,共4页理论物理通讯（英文版）

基　　金：National Natural Science Foundation of China under Grant No.10547108;the Natural Science Foundation of Foshan University

摘　　要：In a four-level atomic system, we investigate the light pulse propagation properties interacting with only one laser field. It is shown that in the steady state, the group velocity of the light pulse can be changed from subluminal to superluminal by varying the field detuning. Meanwhile, the effects of the field intensity on the group velocity are also shown. At last, with special parameters, the analytical solution for the group index is also obtained.

关 键 词：SUPERLUMINAL SUBLUMINAL 

分 类 号：O57[理学—粒子物理与原子核物理]