论文标题
$ C_S^2（w）$ COM-KESSESS $ BROTROPIC FLOID模型的描述
Purely kinetic k-essence description of $c_s^2(w)$ barotropic fluid models
论文作者
论文摘要
文献中已经显示出纯粹的动力学K效率模型是黑暗能量或深色物质 - 黑暗能量统一的正压流体模型的现场理论。在建模框架中，将正压流体的声音速度建模为其状态参数方程的函数，提出了获得等效纯粹动力学K essence模型的Lagrangian密度的系统过程。当这种建模方法始于声音的速度时，可以构建纯粹的动力学K效率模型，以使声音速度与观察性约束一致。取决于声音平方的正压流体速度的选定功能形式，可在参数和封闭形式中用于纯粹的动力学K- essence lagrangian密度的溶液示例。
Purely kinetic k-essence models have been shown in the literature to be a field theory equivalent of barotropic fluid models of dark energy or dark matter-dark energy unification. In the modeling framework where the speed of sound squared of a barotropic fluid is modeled as a function of its Equation of State parameter, a systematic procedure of obtaining the Lagrangian density of an equivalent purely kinetic k-essence model is presented. As this modeling approach starts from the speed of sound, purely kinetic k-essence models can be constructed for which the speed of sound is in agreement with the observational constraints. Depending on the chosen functional form for the barotropic fluid speed of sound squared, analytically tractable examples of solutions for the purely kinetic k-essence Lagrangian density in parametric and closed form are obtained.
