Chinese Journal of Quantum Electronics

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Nonclassical properties of cavity optomechanical system manipulated by squeezing

PENG Jizhu, MA Yuhang, LIU Min, XU Yejun   

  1. Interdisciplinary Research Center of Quantum and Photoelectric Information,School of Mechanical and Electronic Engineering,Chizhou University,Chizhou,24700,China
  • Published:2019-09-28 Online:2019-09-18

Abstract: The dynamical properties of 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 parameter k.

Key words: quantum optics, optomechanical system, linear entropy, Wigner function, squeezing effect