Various dark energy models for variables G and Lambda in f (R, T) modified theory

AKTAŞ C.

MODERN PHYSICS LETTERS A, vol.34, no.13, 2019 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 34 Issue: 13
  • Publication Date: 2019
  • Doi Number: 10.1142/s0217732319500986
  • Journal Name: MODERN PHYSICS LETTERS A
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: f(R, T) theory, FRW universe, dark energy, tachyon field, k-essence, quintessence
  • Çanakkale Onsekiz Mart University Affiliated: Yes

Abstract

In this paper, we have researched tachyon field, k-essence and quintessence dark energy (DE) models for Friedmann-Robertson-Walker (FRW) universe with varying G and A in f (R, T) gravitation theory. The theory of f (R, T) is proposed by Harko et al. [Phys. Rev. D 84, 024020, 2011]. In this theory, R is the Ricci scalar and T is the trace of energy-momentum tensor. For the solutions of field equations, we have used linearly varying deceleration parameter (LVDP), the equation of state (EoS) and the ratio between A and Hubble parameter. Also, we have discussed some physical behavior of the models with various graphics.