Controllable double electromagnetically induced transparency in a closed four-level-loop cavity

Controllable double electromagnetically induced transparency in a closed four-level-loop cavity–atom system

Guo Miao-Di, Su Xue-Mei^†

(color online) The phase shift of (a), (c), (e) the transmitted probe field and (b), (d), (f) the reflected probe field versus probe frequency detuning : (a), (b) , ; (c), (d) , ; (e), (f) , . The other parameters are , N = 2, , , φ = 0, , and π.