Fig. 1. Schematic diagrams of physical model and energy level structure. (a) Schematic diagram of single mode cavity coupled with two-level atom; (b) system level structure used for implementation of photon blockade effect

Fig. 2. Mean photon number and photon correlation function varying with normalized detuning Δ/κ and coupling strength g/κ between atom and cavity. (a) Mean photon number; (b) two-photon correlation function g(2)(0)

Fig. 3. Two-photon correlation function g(2)(0) and mean photon number as functions of normalized detuning Δ/κ. (a) η/κ=0.1;(b) η/κ=1.0

Fig. 4. Schematic diagrams of physical model and energy level structures. (a) Schematic diagram of single mode cavity coupled with two two-level atom; (b)(c) system energy level structures for same coupling strength and different coupling strength between two atoms and cavity, respectively

Fig. 5. Mean photon number and photon correlation function varying with normalized detuning Δ/κ and phase difference ϕz. (a) Mean photon number a†a; (b) two-photon correlation function g(2)(0); (c) three-photon correlation function g(3)(0)

Fig. 6. Mean photon number and correlation function varying with normalized detuning Δ/κ and driving field strength η/κ. (a) Mean photon number a†a; (b) two-photon correlation function g(2)(0); (c) three-photon correlation function g(3)(0)