Abstract
The runaway potentials, which do not possess any critical points, are viable potentials which befit the recently proposed de Sitter swampland conjecture very well. In this work, we embed such potentials in the warm inflation scenario motivated by quantum field theory models generating a dissipation coefficient with a dependence cubic in the temperature. It is demonstrated that such models are able to remain in tune with the present observations and they can also satisfy all the three Swampland conjectures, namely the Swampland Distance conjecture, the de Sitter conjecture and the Transplackian Censorship Conjecture, simultaneously. These features make such models viable from the point of view of effective field theory models in quantum gravity and string theory, away from the Swampland.
Highlights
The fact that achieving a stable or metastable de Sitter vacuum in M or string theory has proven to be a tasking job for decades1 has led to the recently proposed de Sitter swampland criterion [5,6,7], which is conjectured to constrain constructions of the de Sitter vacuum within string landscapes
Since the power p in the temperature satisfies −4 < p < 4, we find that only those cases of dissipation coefficient having a power in the temperature with p > 2 will lead to a dissipation ratio decreasing with the number of e-folds, which ensures that warm inflation (WI) can gracefully exit in this class of models [31]
A dissipation coefficient with a cubic dependence in the temperature is well motivated by both early and recent models of WI, and, it is quite suitable for the study we have performed in the present work
Summary
The fact that achieving a stable or metastable de Sitter vacuum in M or string theory has proven to be a tasking job for decades (see, e.g., Ref. [1] for a recent review) has led to the recently proposed de Sitter swampland criterion [5,6,7], which is conjectured to constrain constructions of the de Sitter vacuum within string landscapes. As it is essential to fulfill all the above three swampland criteria in order to realize an inflationary phase in any effective field theory consistent with the string landscape, it turns out to be a challenging task to realize canonical single-field slow-roll inflationary dynamics in a string vacuum [12,18,19,20] [31], such a potential can gracefully exit in WI if the dissipative coefficient has a dependence on the temperature of the radiation bath like Υ ∝ Tp, with power p > 2 This was, for instance, the case studied in the model of Ref. Two Appendixes are included to describe some of the technical details
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