The mean photon number of the cavity field versus time t for atom–cavity resonant interaction with (a) Δ_cl = 1, (b) Δ_cl = 0.37, and (c) Δ_cl = 0.5. In the right panels, the green crosses indicate the photon jump events resulted from cavity decay. The atom jumps are not indicated. Further parameters are (κ,Γ,γ,η) = (0.2,0.1,0.1,0.1). All parameters in units of g.