四能级原子系统中光脉冲的亚光速和超光速传播  

Subluminal and Superluminal Light Pulse in a Four Level System

作　　者：徐天赋[1] 苏雪梅[1] 

机构地区：[1]吉林大学物理学院

出　　处：《吉林大学学报（理学版）》2006年第4期621-624,共4页Journal of Jilin University:Science Edition

基　　金：吉林大学博士启动基金(批准号:420010306007)

摘　　要：提出在一个四能级原子系统中,通过控制外加微波场的强度,实现光脉冲的亚光速和超光速传播的理论模型.分析了两个上能级间隔对光场群速度的影响,并比较了四能级系统与三能级Λ系统之间的差异.A scheme was proposed to realize subluminal and superluminal propagation for the probe field by controlling the strength of a microwave field in a four-level system at zero-absorption. The effect of the energy- level difference between the two upper superfine levels on the group velocity of the probe field was The results between A-type three-level and the four-level system were compared.

关 键 词：量子相干 亚光速 超光速 零吸收 

分 类 号：O431.2[机械工程—光学工程]