English

Dynamical system analysis of Myrzakulov gravity

General Relativity and Quantum Cosmology 2022-11-30 v2 Cosmology and Nongalactic Astrophysics High Energy Physics - Theory

Abstract

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 {\Lambda}CDM 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 {\Lambda}CDM 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.

Keywords

Cite

@article{arxiv.2202.10871,
  title  = {Dynamical system analysis of Myrzakulov gravity},
  author = {G. Papagiannopoulos and Spyros Basilakos and Emmanuel N. Saridakis},
  journal= {arXiv preprint arXiv:2202.10871},
  year   = {2022}
}

Comments

To appear in Phys. Rev. D

R2 v1 2026-06-24T09:49:37.406Z