Bouncing Cosmology in Extended Gravity and Its Reconstruction as Dark Energy Model. Issue 1 (14th November 2021)

• Record Type: Journal Article
• Authors: Agrawal, A. S.; Tello‐Ortiz, Francisco; Mishra, B.; Tripathy, S.K.
• Is Part Of: Fortschritte der Physik. Volume 70:Issue 1(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-11-14
• Subjects: dark energy -- extended gravity -- matter bounce -- perfect fluid -- stability analysis; Physics -- Periodicals; 530.05
• DOI: 10.1002/prop.202100065
• Languages: English
• ISSNs: 0015-8208

Abstract

Abstract: In this paper, we have presented a bouncing cosmological model of the Universe in an extended theory of gravity. The dynamical behaviour of the model obtained from the flat FLRW space‐time along with the violation of null energy condition have been shown. The geometrical parameters show singularity behaviour at the bouncing epoch. The parameters involved in the scale factor play a major role in the bouncing behaviour. In addition, the coupling parameter that resulted in the minimal matter‐geometry coupling in the extended gravity has significant role to avoid the singularity of equation of state parameter at the bouncing epoch. Using a linear homogeneous perturbation calculation, we show the dynamical stability of the model. Abstract : In this paper, a bouncing cosmological model of the Universe is presented in an extended theory of gravity. The dynamical behaviour of the model obtained from the flat FLRW space‐time along with the violation of null energy condition have been shown. The geometrical parameters show singularity behaviour at the bouncing epoch. The parameters involved in the scale factor play a major role in the bouncing behaviour. In addition, the coupling parameter that resulted in the minimal matter‐geometry coupling in the extended gravity has significant role to avoid the singularity of equation of state parameter at the bouncing epoch. Using a linear homogeneous perturbation calculation the dynamical stability of the model is shown.