研究了压缩真空态和数态输入下腔光力系统的动力学演化特性, 分析了系统参数对系统线性熵和Wigner函数的调控作用。数值计算表明:调节压缩因子r可以改变机械 模Wigner函数分布特性,当r取较大值时,可使腔模与机械模间的纠缠显著增强;增大机械模参数k的取值, 将减小腔模Wigner函数负值深度和范围。

The dynamical properties of cavity optomechanical system are investigated for an initial state composed of squeezed vacuum state and number state. The effect of system parameters on the linear entropy and Wigner function is analyzed. The numerical results indicate that the Wigner function for mechanical mode can be effectively manipulated by adjusting the value of squeezing factor r. Especially, increasing the value of r can enhance significantly the entanglement between cavity mode and mechanical mode. Both negativity depth and region of the Wigner function for optical mode decrease with increasing the value of the mechanical mode parameter k.