Generation and control of coherent second sound in quantum paraelectrics

为了在量子准电中产生温度波（第二声），提出了一种基于非平衡热力学的更系统的光散射光谱分析方法。同时，结合自发光散射和高分辨率受激布里渊散射，确定了声子-声子散射的正常弛豫时间和电阻弛豫时间，这是第二声产生的重要基础信息。

A more systematic analyzing method for light-scattering spectrum has been developed basing on non-equilibrium thermodynamics, in order to optically generate the temperature wave (second sound) in quantum paraelectrics. Also, combining spontaneous light-scattering and high-resolution stimulated Brillouin scattering, the normal and resistive relaxation times in phonon-phonon scattering, which are essential fundamental information for generation of second sound, have been determined.