Subluminal and Superluminal Phenomena in a Four-Level Atom |
| |
| Authors: | HAN Ding-An ZENG Ya-Guang CAO Hui |
| |
| Affiliation: | Physics Department, Foshan University, Foshan 528000, China |
| |
| Abstract: | In a four-level atomic system, we investigate the light pulsepropagation properties interacting with only one laser field. It isshown that in the steady state, the group velocity of the lightpulse can be changed from subluminal to superluminal by varying thefield detuning. Meanwhile, the effects of the field intensity on thegroup velocity are also shown. At last, with special parameters, theanalytical solution for the group index is also obtained. |
| |
| Keywords: | superluminal subluminal |
|
| 点击此处可从《理论物理通讯》浏览原始摘要信息 |
|
点击此处可从《理论物理通讯》下载全文 |
|
