论文标题
宇宙学总能量密度和瞬时宇宙学的演变
Evolution of Cosmological Total Energy Density and Transient Periods in Cosmology
论文作者
论文摘要
传统上，通过监视其材料含量如何随着扩展的方式而发展，可以检查宇宙的演变。隔离系统的这种模型表示为散装的运动方程，但分为不同的时期。特别是，{\ it $ friedmann-lema \ hat {i} tre-robertson-walker $}（frlw）宇宙的演变被分为不同的时代，这些时期的特征是，无论哪种质量能量密度构成的动力学在当时均以主体能力构成。在特定时期对宇宙演化的标准分析通常仅考虑主能量密度的演变，而无视所有其他能量密度。尽管这代表了限制案例，但原则上，尤其是在各种相互竞争的质量能密度或时期之间的过渡期的相等性的附近，他人的贡献并不能总是被忽略。我们检查了不同时期内总能量密度而不是个体能量密度的演变。我们发现，考虑到各种成分的贡献导致了更广泛的进化历史，从而丰富了标准图片。
The evolution of the Universe is traditionally examined by monitoring how its material content evolves as it expands. This model of an isolated system is expressed as the equation of motion of the bulk but segmented into different epochs. In particular, the evolution of the {\it $Friedmann-Lema\hat{i}tre-Robertson - Walker$} (FRLW) Universe is separated into different epochs that are characterised by the dynamics of whichever mass-energy density constituent is dominant at the time. The standard analysis of the evolution of the Universe in a particular epoch often considers the evolution of the dominant energy density only, disregarding all others. Whereas this represents the limiting case, in principle the contributions from others cannot always be ignored particularly in the vicinity of the equality of the various competing mass-energy densities or the transition periods between epochs. We examine the evolution of the total energy density rather than individual energy densities during the different epochs. We find that taking into account the contributions from the various constituents lead to a broader range of possible evolution histories which enriches the standard picture.
