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arXiv 2202.10871gr-qcastro-ph.COhep-th
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Myrzakulov引力的动力系统分析

Dynamical system analysis of Myrzakulov gravity

G. Papagiannopoulos, Spyros Basilakos, Emmanuel N. Saridakis

摘要:

我们对Myrzakulov或F(R,T)引力进行了动力系统分析,这是仿射连接度量理论的一个子类,其中使用了一个特定但非特殊的连接,它同时允许非零曲率和挠率。我们考虑两类模型,我们提取的临界点,我们检查他们的稳定性及其物理特性。在以ΛCDM宇宙学为极限的第一类模型中,我们发现了物质和暗能量纪元的序列,并证明了宇宙将导致一个暗能量占主导地位的临界点,在这个临界点上,暗能量的行为类似于一个宇宙学常数。关于暗能量状态方程参数,我们发现,它位于精华或幻影区,根据模型参数的值。对于第2类模型,我们再次发现暗能量主导的de Sitter晚时吸引子,尽管该场景不具有ΛCDM宇宙学作为限制。宇宙学行为更加丰富,暗能量部分可以是精粹般的,幻影般的,或者在进化过程中经历幻影鸿沟的跨越。

英文摘要:

We perform a dynamical system analysis of Myrzakulov or F(R, T) gravity, which is a subclass of affinely connected metric theories, where ones uses a specific but non-special connection, which allows for non-zero curvature and torsion simultaneously. We consider two classes of models, we extract the critical points, and we examine their stability properties alongside their physical features. In the Class 1 models, which possess ΛCDM cosmology as a limit, we find the sequence of matter and dark energy eras, and we show that the Universe will result in a dark-energy dominated critical point for which dark energy behaves like a cosmological constant. Concerning the dark-energy equation-of-state parameter we find that it lies in the quintessence or phantom regime, according to the value of the model parameter. For the Class 2 models, we again find the dark-energy dominated, de Sitter late-time attractor, although the scenario does not possess ΛCDM cosmology as a limit. The cosmological behavior is richer, and the dark-energy sector can be quintessence-like, phantom-like, or experience the phantom-divide crossing during the evolution.

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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