New approach to solving master equations of density operator for the Jaynes Cummings model with cavity damping

By introducing thermo-entangled state representation |η〉, which can map master equations of density operator in quantum statistics as state-vector evolution equations, and using "dissipative interaction picture" we solve the master equation of Jaynes—Cummings model with cavity damping. In addition we derive the Wigner function for density operator when the atom is initially in the up state |↑〉 and the cavity mode is in coherent state.