论文标题
各向异性宇宙中的天际流体
Skyrme Fluid in Anisotropic Universe
论文作者
论文摘要
宇宙学是在各向异性的Kantowski-Sachs（KS）和Bianchi I型宇宙中获得的，考虑到具有Skyrme流体的宇宙常数。有趣的是，在KS和Bianchi-I各向异性宇宙中获得的解决方案在很晚是各向同性化的，因为即使没有$λ$期限或任何涉及Efferaton场的通货膨胀机制，Skyrme流体即使存在Skyrme流体。在这里对两个各向异性宇宙学模型进行了比较研究，发现Bianchi-I宇宙允许给定物质配置的振荡解决方案。我们还注意到，可以使用Skyrme流体获得新兴的宇宙模型。已经研究了各向异性，减速和混蛋参数以及线性扰动稳定性，以探索模型的功效。两种宇宙学模型在没有宇宙学常数的情况下都是稳定的，除了它们与观察数据的兼容性外。因此，我们声称Skyrme流体是通过加速膨胀对各向异性宇宙各向同性化的可能来源，该膨胀能够再现宇宙的某些观察到的特征。
Cosmological solutions are obtained in an anisotropic Kantowski-Sachs (KS) and Bianchi Type-I universes considering a cosmological constant with Skyrme fluid. Interestingly, the solutions obtained here in both the KS and Bianchi-I anisotropic universes are found isotropize at late time due to the presence of the Skyrme fluid even in the absence of $Λ$ term or any inflationary mechanism involving the inflaton field. A comparative study of both the anisotropic cosmological models are carried out here and found that Bianchi-I universe admits oscillatory solutions for a given matter configuration. We also note that the emergent universe model can be obtained with Skyrme fluid. The anisotropy, deceleration and jerk parameters have been studied along with the linear perturbative stability to explore efficacy of the model. Both the cosmological models are stable in the absence of cosmological constant besides their compatibility with observational data. Thus, we claim Skyrme fluid a possible source for isotropization of an anisotropic universe via accelerated expansion, which is capable of reproducing some observed features of the universe.
