journal6 ›› 2015, Vol. 36 ›› Issue (1): 21-27.DOI: DOI:10.3969/j.issn.1007-2985.2015.01.007

• Physics and Computer • Previous Articles     Next Articles

Dynamical Dissipative Cooling of a Cavity Opto-Mechanical Oscillator

 MI  Xian-Wu, LI  Xiu-Hong   

  1. (1.Department of Physics and Information Engineering,Huaihua University,Huaihua 418000, Hunan China;2.College of Physics,Mechanical and Electrical Engineering,Jishou University,Jishou 416000,Hunan China)
  • Online:2015-01-25 Published:2015-01-29
  • About author:MI Xianwu(1973—),male,was born in Hunan,China;received the microelectronics and solic state electronics Ph. D degree from the graduate school of Chinese Academy of Sciences;research interests include theoretical aspects of semiconductor lasers and amplifiers and terahertz physics.
  • Supported by:

    Project supported by the National Science Foundation of China (10647132);Scientific Research Fundation of Hunan Provincial Education Department,China (10A100)

Abstract: The dynamical cooling process of a cavity opto-mechanical system is investigated by a master equation.The mean phonon number is calculated using the covariance approach.Firstly,the effect of different cavity dissipation rate on the mean phonon number is discussed in the strong coupling system.Then the variation of mean phonon number changing with different parameters in the weak and strong coupling system is compared.For strong coupling regime,the mean phonon number oscillates periodically with the increase of coupling strength and it decreases fast as the cavity dissipation rate increases.Finally,it reaches a cooling limit.In the weak coupling regime,the mean phonon number increases fast as the cavity dissipation rate increases and it reaches equilibrium in the end.

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