Warm $$\beta $$-exponential inflation and the swampland conjectures

Santos, F. B. M. dos; Silva, R.; Costa, S. Santos da; Benetti, Micol; Alcaniz, J. S.

doi:10.1140/epjc/s10052-023-11329-w

Cited by 9 publications

(6 citation statements)

References 77 publications

(123 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, there are several papers in the literature which studied WI using some quasi-de Sitter form of scale factor, e.g., intermediate and logamediate inflation, and other non-canonical versions of field theory, e.g., tachyonic fields, in the high dissipative regime [117][118][119][120][121][122][123][124][125], while there have been also many studies involving different forms of inflaton potentials and in other interesting contexts [79,111,[126][127][128][129][130][131][132][133][134][135][136][137][138][139][140][141][142][143][144].…”

Section: Other Applications and Recent Results In Wimentioning

confidence: 99%

Recent Developments in Warm Inflation

2023

View full text Add to dashboard Cite

Warm inflation, its different particle physics model implementations, and the implications of dissipative particle production for its cosmology are reviewed. First, we briefly present the background dynamics of warm inflation and contrast it with the cold inflation picture. An exposition of the space of parameters for different well-motivated potentials, which are ruled out, or severely constrained in the cold inflation scenario, but not necessarily in warm inflation, is provided. Next, the quantum field theory aspects in realizing explicit microscopic models for warm inflation are given. This includes the derivation of dissipation coefficients relevant in warm inflation for different particle field theory models. The dynamics of cosmological perturbations in warm inflation are then described. The general expression for the curvature scalar power spectrum is shown. We then discuss in detail the relevant regimes of warm inflation, the weak and strong dissipative regimes. We also discuss the results predicted in these regimes of warm inflation and how they are confronted with the observational data. We explain how the dissipative dynamics in warm inflation can address several long-standing issues related to (post-) inflationary cosmology. This includes recent discussions concerning the so-called swampland criteria and how warm inflation can belong to the landscape of string theory.

show abstract

Section: Other Applications and Recent Results In Wimentioning

confidence: 99%

Recent Developments in Warm Inflation

2023

View full text Add to dashboard Cite

show abstract

“…the slow-roll conditions obtained in cold inflation, which take into account dissipation through the parameter Q. For Q 1, the slow-roll conditions are substantially relaxed and can in principle be satisfied by scalar field potentials that would otherwise violate the standard slow-roll conditions in the cold inflation scenario [38][39][40][41].…”

Section: Jcap03(2023)002mentioning

confidence: 99%

Observational constraints on warm natural inflation

Montefalcone

Aragam

Visinelli

et al. 2023

J. Cosmol. Astropart. Phys.

View full text Add to dashboard Cite

Warm natural inflation is studied for the case of the original cosine potential. The radiation bath during inflation induces a dissipation (friction) rate in the equation of motion for the inflaton field, which can potentially reduce the field excursion needed for an observationally viable period of inflation. We examine if the dissipation thus provides a mechanism to avoid the large decay constant f ≳ M pl of cold cosine natural inflation. Whereas temperature independent dissipation has previously been shown to alleviate the need for a trans-Planckian decay constant f, we illustrate here the difficulties of accommodating a significantly sub-Planckian decay constant (f < 10-1 M pl) for the case of a temperature dependent dissipation rate in the form Γ ∝ Tc , with c = {1,3}. Such dissipation rates represent physically well-motivated constructions in the literature. For each model, we map its location in the r-ns plane and compare with cosmic microwave background (CMB) data. For c = 1 (c = 3), we find that agreement with CMB data requires that dissipation be in the weak (moderate) regime and that the minimum allowed value of the decay constant in the potential is f min = 0.3 (0.8) M pl, respectively.

show abstract

“…Contrary to cold inflation, warm inflation is an interesting framework in which these conjectures could be satisfied due to the modified dynamics of inflaton field. There exists a few warm inflationary studies [61,62,[162][163][164][165][166] in this context, which show that with a strong dissipation, the energy scale of inflation is sufficiently lowered, satisfying the above conjectures. Here we discuss the status of these conjectures for our warm Higgs-G model.…”

Section: Jcap02(2024)034mentioning

confidence: 54%

Primordial black holes dark matter and secondary gravitational waves from warm Higgs-G inflation

Arya,

Jain,

Mishra

2024

J. Cosmol. Astropart. Phys.

View full text Add to dashboard Cite

We explore the role of dissipative effects during warm inflation leading to the small-scale enhancement of the power spectrum of curvature perturbations. In this paper, we specifically focus on non-canonical warm inflationary scenarios and study a model of warm Higgs-G inflation, in which the Standard Model Higgs boson drives inflation, with a Galileon-like non-linear kinetic term. We show that in the Galileon-dominated regime, the primordial power spectrum is strongly enhanced, leading to the formation of primordial black holes (PBH) with a wide range of the mass spectrum. Interestingly, PBHs in the asteroid mass window ∼ (1017–1023) g are generated in this model, which can explain the total abundance of dark matter in the Universe. In our analysis, we also calculate the secondary gravitational waves (GW) sourced by these small-scale overdense fluctuations and find that the induced GW spectrum can be detected in future GW detectors, such as LISA, BBO, DECIGO, etc. Our scenario thus provides a novel way of generating PBHs as dark matter and a detectable stochastic GW background from warm inflation. We also show that our scenario is consistent with the swampland and the trans-Planckian censorship conjectures and, thus, remains in the viable landscape of UV complete theories.

show abstract

Warm $$\beta $$-exponential inflation and the swampland conjectures

Cited by 9 publications

References 77 publications

Recent Developments in Warm Inflation

Recent Developments in Warm Inflation

Observational constraints on warm natural inflation

Primordial black holes dark matter and secondary gravitational waves from warm Higgs-G inflation

Contact Info

Product

Resources

About