Inflation in f(R,T) gravity with Double-Well potential

Abstract

In this piece of work, we studied the inflation in the context of f(R,T) theory of gravity. We assumed the functional form of f(R,T) to be R + λT , where R is the Ricci scalar, T is the trace of the Energy-Momentum tensor and λ is the model parameter. The cosmological observable parameters like scalar spectral index ns and tensor-to-scalar ratio r are estimated for Double-Well potential. We found that for λ = 115, ns and r are in good agreement with PLANCK 2018 data. Further, considering the vacuum expectation value in Double-Well potential to be Planckian, we observed the admissible range of model parameter to be 101 < λ < 130 for which this model remains consistent with PLANCK 2018 data.

Constraining logarithmic $f(R,T)$ model using Dark Energy density parameter $Ω_Λ$ and Hubble parameter $H_0$

“…al is found to be extremely sound in explaining cosmological phenomena. It has been studied with reference to inflation [14,15,16,17], dark energy [18,19,20,21,22], dark matter [23], wormhole [24,25,26,27,28,29,30], pulsar [31,32], white dwarfs [33], gravitational waves [34,35], scalar field models [36,37], anisotropic models [38,39], bouncing cosmology [40,41], big-bang neucleosysnthesis [42], baryogenesis [43], brane world [44,45] etc. Further, the energy conditions and junction conditions in f (R, T ) gravity have also been studied [46,47,48,49].…”