Symmetric teleparallel gravity with variable deceleration parameter

Shukla B. K., Tiwari R., Beesham A., SOFUOĞLU D., Mustafa G.

International Journal of Geometric Methods in Modern Physics, 2024 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1142/s0219887825500021
  • Dergi Adı: International Journal of Geometric Methods in Modern Physics
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Communication Abstracts, Metadex, zbMATH, Civil Engineering Abstracts
  • Anahtar Kelimeler: f(Q) theory of gravity, observational constraint, variable deceleration parameter
  • İstanbul Üniversitesi Adresli: Evet

Özet

In this paper, our investigation focuses on the cosmic history in modified f(Q) gravity, a different theory that describes the gravitational force using a non-metricity scalar. The equations of the theory are solved by assuming a parametric form for the deceleration parameter. The parameters of the model are estimated by using the Cosmic Chronometer dataset. A number of parameters, like the deceleration parameter, whose signature changes with redshift and shows typical behavior in late-time cosmology, are subject of our analysis. We also show the evolution of other parameters, such as the equation of state parameter and energy density. The parametrization approach used here in f(Q) modified gravity provides a better description of the late-time cosmic evolution without dark energy.