The influences of the detuning parameter, the two-mode light field intensity and the atomic distribution angle on the fidelity of quantum states are discussed by using numerical calculations.

• 结果表明：原子的量子态保真度优于系统的或光场的量子态保真度，原子初始处于基态时，原子的保真度好于激发态或叠加态的情况；