色散吸收非对称介质光腔系统中光场量子起伏的功率谱

借助系统格林函数和色散吸收介质中电磁场量子化过程,通过数值计算研究非对称色散吸收介质光腔系统中光场量子起伏的功率谱.结果表明,介质的折射和吸收性质分别对真空场起伏功率谱的振荡频率、振幅产生影响,腔两侧介质折射系数的对称性能更有效地抑制腔外空间场起伏功率谱的振荡;介质折射系数愈大,则其中光场起伏功率谱振荡中心愈低、振荡频率愈大,与此同时,光腔内真空场起伏功率谱振荡幅度加大.

THE POWER SPECTRUM OF QUANTUM FLUCTUATIONS IN LIGHT CAVITY SYSTEM FORMED BY THE DISPERSION AND ABSORPTION MEDIA

The power spectrum of quantum fluctuations of optic field in the dispersion and absorption media cavity system is investigated by use of the Green′s function,the quantization course and numerical value calculation.The result shows that the refractive and absorption character of the media make different influence on the vibration frequency,amplitude of the vacuum field fluctuations power spectrum separately,the symetry of the refractive coefficient in the both sides can more effetely restrain the vibration of the power spectrum for the field outside the cavity;the more is the refractive coefficient of media,the lower is the vibration centre and the larger is the vibration frequency,otherwise,the vibration amplitude of power spectrum in the cavity rise up.