Transient Dynamics of Light Propagation in A-Atom EIT Medium

作     者：LI Yong LIU Xu-Feng 

作者机构：Institute of Theoretical Physics the Chinese Academy of Sciences Beijing 100080 China Interdisciplinary Center of Theoretical Studies the Chinese Academy of Sciences Beijing 100080 China Department of Mathematics Peking University Beijing 100871 China 

出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)

年 卷 期：2005年第44卷第2X期

页      面：356-364页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：国家自然科学基金 国家重点基础研究发展计划(973计划) 

主　　题：electromagnetically induced transparency group velocity collective excitation polariton 

摘      要：We investigate the transient phenomenon or property of the propagationof an optical probe field in a medium consisting of many A-type three-level atoms coupled to this probe field and a classical driven field. We observe a hidden symmetry and obtain an exact solution for this light propagation problem by means of the spectral generating method. This solution enlightens us to propose a practical protocol implementing the quantum memory robust for quantum decoherence in a crystal. As a transient dynamic process this solution also manifests an exotic result that a wave-packet of light will split into three packets propagating at different group velocities. It is argued that super-luminal group velocity and sub-luminal group velocity can be observed simultaneously in the same system. This interesting phenomenon is expected to be demonstrated experimentally.