Analytical solutions for a doubly driven two-level atom

Liu Jin-Yun¹, Jia Feng-Dong¹, Li Xiao-Kang¹, Lv Shuang-Fei¹, Xu Xiang-Yuan^{2, 3}, Xue Ping², Zhong Zhi-Ping^{1, †}

The present Rabi frequency as a function of the detuning in the case that the second coupling field passes through the atom sample with a counterpropagating beam.