均匀和非均匀极化系统中的弛豫。介观熵方法
Relaxation in homogeneous and non-homogeneous polarized systems. A mesoscopic entropy approach
摘要：
通过服从福克-普朗克方程的概率分布函数描述了与热浴接触的轴向矢量相关的自由度的动力学。该方程是通过使用介观非平衡态热力学导出的，并允许制定轴向自由度（取向，极化）及其相关的序参量的动力学理论。该理论用于描述强电场存在下均匀和非均匀系统的介电弛豫。在均匀的情况下，我们得到的弛豫时间的依赖性的外场在实验中观察到的。在非均匀的情况下，我们的模型占两个观察到的介电损耗的最大值给出了一个很好的定量描述的实验数据在所有的频率，特别是低分子量的系统。
英文摘要：
The dynamics of a degree of freedom associated to an axial vector in contact with a heat bath is decribed by means of a probability distribution function obeying a Fokker-Planck equation. The equation is derived by using mesoscopic non-equilibrium thermodynamics and permits a formulation of a dynamical theory for the axial degree of freedom (orientation, polarization) and its associated order parameter. The theory is used to describe dielectric relaxation in homogeneous and non-homogeneous systems in the presence of strong electric fields. In the homogeneous case, we obtain the dependence of the relaxation time on the external field as observed in experiments. In the non-homogeneous case, our model account for the two observed maxima of the dielectric loss giving a good quantitative description of experimental data at all frequencies, especially for systems with low molecular mass.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
