Swampland criteria of inflationary scalar field models with well-known potentials

Abstract

We explore the swampland conjectures of quintessence and tachyon scalar field models in f(T) and Einstein gravities, respectively. In f(T) gravity, we consider cold and warm (by assuming generalized dissipative coefficient) inflationary scenarios and develop constraints on de-Sitter conjectures through Bekenstein entropy relation. In usual inflation, the de-Sitter conjecture constraint becomes constant (in terms of models constant parameters) which can be easily analyzed for its validity (i.e., |V′| V ≤ O(1)). However, in warm inflation, we analyze the de-Sitter conjecture constraint through τ′V τV′, i.e., if τ′V τV′ < 1 then |V′| V ≤ O(1) and hence we can obtain the required result. For evaluating this condition, we choose three well-known potentials such as monomial chaotic, hilltop and generalized exponential. It is observed that the condition τ′V τV′ < 1 satisfied for all three potentials in both regimes of dissipative coefficient for specific choice of constants. We also obtain satisfactory results of de-Sitter conjecture for tachyon and polytropic (with quintessence scalar field) in general relativity. We investigate the consistency of assumed potentials through inflationary parameters ns and r comparing with Planck's observational data 2018 and found them compatible with the recent observations.