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arXiv 1609.01310gr-qcmath-phmath.DSmath.MP
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具有任意宇宙学常数的真空Bianchi V型宇宙的动力学

Dynamics of a Vacuum Bianchi Type V Universe with an Arbitrary Cosmological Constant

Ikjyot Singh Kohli

摘要:

本文描述了具有任意宇宙学常数的Bianchi V型真空宇宙的动力学。首先,我们使用正交框架的方法来写爱因斯坦的场方程作为一个耦合系统的一阶常微分方程。结果表明,该动力学系统的平衡点分别是膨胀和收缩的de Sitter宇宙解、Minkowski时空解和静态的Anti-de Sitter宇宙解,这些解的特征是除了具有恒定的负空间曲率外,还具有负宇宙学常数.我们证明了$Λ> 0$的de Sitter宇宙解是渐近稳定的,同时也证明了$Λ< 0$的AdS解是稳定的,因为解在它周围形成封闭的轨道,并且证明了不同的平衡点之间通过$Λ$的一系列分支相互联系.

英文摘要:

In this paper, we describe the dynamics of a Bianchi Type V vacuum universe with an arbitrary cosmological constant. We begin by using an orthonormal frame approach to write Einstein's field equations as a coupled system of first-order ordinary differential equations. The equilibrium points of the resulting dynamical system are found to be expanding and contracting de Sitter universe solutions, a Minkowski spacetime solution, and static Anti-de Sitter universe solutions, which are characterized by a negative cosmological constant in addition to constant negative spatial curvature. While the expanding de Sitter universe solution is found to be asymptotically stable for $Λ> 0$, we also found that the AdS solution is stable for $Λ< 0$, as solutions form closed trajectories around it. Further, we show that the different equilibrium points are related to each other by a series of bifurcations of $Λ$.

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。

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