Non-minimally coupled f(R) cosmology

Acceleration of the universe in f(R) gravity models

“…However, it has been shown that, along with a matter field, any such model could behave in quite a different manner Amendola, Gannouji, Polarski and Tsujikawa 2007). Some models where the Ricci scalar is non-minimally coupled to the matter sector are also there in literature (Thakur et al 2011). Some of the modifications of the geometry sector also involves a function of G, the Gauss-Bonnet scalar.…”

Energy momentum tensor of a non-minimally coupled scalar from the equivalence of the Einstein and Jordan frames

“…But this modification would vanish in the solar system order [10][11][12][13][14]. Of the post GR models where the coupling is not separable are called non-minimally coupled theory (NMCT) [15][16][17][18][19][20][21][22]. It appears that for non-minimally coupled theory, it will be difficult to find an algorithm to construct the EMT.…”

Solar system tests for realistic f(T) models with non-minimal torsion–matter coupling

“…Compared to f (R) theory, the field equations are second order instead of fourth one, which is an important advantage of f (T ) theory. As a further extension, and an analogy to that of f (R) theories [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29], non-minimal torsion-matter coupling f (T ) gravity has been proposed and studied [30]. In the previous research [31], using the observation data of type Ia supernovae (SNeIa), cosmic microwave background (CMB), and baryon acoustic oscillations (BAO), we established two concrete f (T ) models with non-minimal torsion-matter coupling extension, and we found that they are successful in describing the observation of the Universe and its large-scale structure and evolution.…”