Fig. 1. (a) Schematic diagram of the cavity setup with an OPA which is pumped by a laser to produce parametric amplification in the cavity; (b) transition paths of the system for quantum interference.(a) 用激光抽运OPA, 在腔内产生参量放大的腔结构示意图; (b) 量子干涉系统的跃迁路径

Fig. 2. Variation curves of the zero-time-delay second-order correlation function with the nonlinear gain G of the OPA. Other parameters are , , . 等时二阶关联函数 随OPA非线性增益G的变化 , ,

Fig. 3. Contour plot of the second-order correlation functions vs. the nonlinear gain G of the OPA and phase . Other parameters are , , . 等时二阶关联函数 数值结果随OPA非线性增益G和相位 的等高线图 , ,

Fig. 4. Contour plot of the second-order correlation functions vs. the phase and . Other parameters are , , . 等时二阶关联函数 数值结果随相位 和 的等高线图 , ,

Fig. 5. Contour plot of the second-order correlation functions vs. the nonlinear gain of the optical parametric amplifier and phase . Other parameters are , , . 等时二阶关联函数 数值结果随OPA非线性增益 和相位 变化的等高线图 , ,

Fig. 6. (a) The second-order correlation functions vs. the nonlinear gain of the optical parametric amplifier ; the blue solid line indicates the numerical results by numerically solving Eq. (3) and the red diamond corresponds to the analytical results of Eq. (13) and Eq. (15); other parameters are ; (b) the second-order correlation functions vs. the phase ; the blue solid line indicates the numerical results by numerically solving Eq. (3) and the red diamond corresponds to the analytical results of Eq. (13) and Eq. (15). Other parameters are G = G_opt. (a) 二阶关联函数 随OPA非线性增益 的变化, 其中蓝色实线由数值求解方程(3)得出, 红色菱形由(13)和(15)式解析得出; 其他参数为 ; (b) 二阶关联函数 随相位 的变化, 蓝色实线由数值求解方程(3)得出, 红色圆形由(13)和(15)式解析得出; 其他参数为