作为调和运动的弗里德曼宇宙学模型和新的精确解
The Friedmann cosmological models revisited as an harmonic motion and new exact solutions
摘要：
本文提出了一种新的任意维Friedmann宇宙学模型的方法。适当地改变时空的参数，就出现了谐波运动方程，其中曲率决定了角频率。还解释了一些物理解释。作为我们的方法的结果，我们给出了新的精确解的爱因斯坦方程时，观察者不与完美的流体，以及，当压力不消失，包括一个新的程序，以获得精确解的情况下，宇宙在暗能量占主导地位的阶段。
英文摘要：
A new approach for arbitrary dimension to the Friedmann cosmological models is presented. Taking suitable changes of the parameters of the spacetime the harmonic motion equations appear, where the curvature determines the angular frequency. Some physical interpretations are also explained. As a consequence of our approach, we give new exact solutions to the Einstein's equation when the observer is not comoving with the perfect fluid, as well as, when the pressure not vanishes, including a new procedure to acquire exact solutions for cases of universes at the dark energy dominated stage.
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