双Λ型五能级系统中的量子相干效应研究

Research of The Quantum Coherence Effects in Double Λ-Type Five-level System

采用锂原子超精细结构的塞曼子能级,与两束偏振方向不同的光场相互作用形成一个双Λ型五能级系统,得到了系统的暗态,并进一步研究了暗态的制备。利用系统的密度矩阵运动方程数值拟合了信号光的吸收、色散曲线,分析了暗态与透明窗口的对应关系。

In this paper,the system formed by a lithium atom interacting with lights having two different polarization directions is studied. The system shows a dual five-level type structure between hyperfine Zeeman sublevels,which results in dark state. The density matrix equations are used to fit the absorption and dispersion curves of the signal light,and the correspondence between the dark state and the transparent window is also analyzed.