Meanwhile, the negative value of the Wigner function is gradually decreased when the amplitudes of light field increase, which means the non-classical characteristic tends to be the classical one.

• 在随光场振幅变化时，维格纳函数的负值性随光场振幅的增强而逐渐减弱，光场的非经典特性逐渐趋近于经典特性。