Various dark energy models with time-varying G and Lambda in f(R, T) gravitation theory

AYGÜN S.

MODERN PHYSICS LETTERS A, vol.34, no.34, 2019 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 34 Issue: 34
  • Publication Date: 2019
  • Doi Number: 10.1142/s0217732319502808
  • Journal Name: MODERN PHYSICS LETTERS A
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: k-essence, tachyon field, cosmological term, f (R, T) gravity, BIANCHI TYPE-I, COSMOLOGICAL MODELS, FRW UNIVERSE, VARIABLE G
  • Çanakkale Onsekiz Mart University Affiliated: Yes

Abstract

In this research, we have investigated tachyon and k-essence dark energy (DE) candidates with varying G and Lambda for Marder universe in f(R, T) gravitation theory [Harko et al., Phys. Rev. D 84, 024020 (2011)]. Here, f(R, T) is the arbitrary function of Ricci scalar (R) and the trace of T-ik. To solve f(R, T) gravity field equations, three different approximations have been used such as cosmological term, equation of state (EoS) parameter and the anisotropy feature of Marder universe. Also, we have discussed some physical results with various graphics.