SGC Switching Between Subluminal to Superluminal Propagation in V-Type Atom  

作　　者：HAN Ding-An GUO Hong BAI Yan-Feng SUN Hui ZENG Ya-Guang 

机构地区：[1]CREAM Group, Key Laboratory for Quantum Information and Measurements of Ministry of Education, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China [2]Physics Department, Foshan University, Foshan 528000, China

出　　处：《Communications in Theoretical Physics》2006年第4X期731-734,共4页理论物理通讯（英文版）

基　　金：The project supported by National Natural Science Foundation of China under Grant No. 10547108

摘　　要：For a V-type three-level atomic system with two closely spaced upper levels, we investigate the light pulse propagation properties with only one laser field. Due to spontaneously generated coherence, the group velocity of the light pulse can be changed from subluminal to superluminal. The effects of the field intensity and the two-upper level splitting on the group velocity are also shown. At last, an analytical expression for the group velocity is given in the case of a weak field.

关 键 词：spontaneously generated coherence SUPERLUMINAL SUBLUMINAL 

分 类 号：O562[理学—原子与分子物理] O43[理学—物理]