以量子力学为基础对耦合场调控Λ型和V型联合原子系统中的吸收特性进行理论研究.针对弱探测场情况,采用微扰法求解系统密度矩阵运动方程,通过数值模拟得到系统的探测吸收谱.以耦合场2作为联结场,将耦合场1和耦合场2组成的V型系统以及耦合场2和探测场构成的Λ型系统联系在一起,通过调谐耦合场1的拉比强度控制EIT线宽和多窗口的变化,调谐耦合场2的频率失谐量控制EIT的非线性特性.
A theoretical study of the absorption characteristics of Λ-type and V-type joint atomic systems by the modulation of coupling fields is performed based on quantum mechanics. Using perturbation method to solve density matrix equations of motion in the system, the probing spectrum is numerically simulated under weak probing field conditions. Using the coupling field 2 as the linked field, we connect V-type system composed of coupling field 1 and coupling field 2 and Λ-type system composed of coupling field 2 and probing field. The line width and multi-window feature of EIT are controlled by tuning the Rabi frequency of coupling field 1, and the nonlinear characteristics of EIT are controlled by tuning the frequency detuning of the coupling field 2.
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