Paradigm of warm quintessential inflation and production of relic gravity waves

Gangopadhyay, Mayukh R.; Myrzakul, Shynaray; Sami, M.; Sharma, Mohit Kumar

doi:10.1103/physrevd.103.043505

Cited by 28 publications

(11 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is evident from the Eqs. (5.4), (5.5) and (5.6) that for a nearly constant H inf , as is the case in this work, the GW energy spectrum for RD is nearly constant for the range k RM −k KR , whereas the GW spectrum has a blue-tilt for the modes entering in the KD epoch and a redtilt for the modes entering in the MD epoch(A detailed study of the GW production in case of warm inflation can be found in the references [56,57]). The full spectrum is shown in Fig.…”

Section: Discussionmentioning

confidence: 51%

The paradigm of warm quintessential inflation and spontaneous baryogenesis

Basak,

Bhattacharya,

Gangopadhyay

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

In this paper, we consider a scenario of spontaneous baryogenesis in a framework of warm quintessential inflation where the residual inflaton field, left out after warm inflation, plays the role of quintessence field at late times and is coupled to a non-conserved baryonic current. Assuming a four fermion (B − L) violating effective interaction, we have demonstrated that the required baryon asymmetry can be produced successfully in this case. We show that the post-inflationary evolution, with the underlying scalar field potential, V (φ) = V 4 0 exp (−αφ n /M 4 Pl ), n > 1 well suited to warm inflation, exhibits scaling behaviour soon after a brief kinetic regime. We show that the coupling of the scalar field to massive neutrino matter can give rise to exit from the scaling regime to cosmic acceleration at late times as massive neutrinos turn non-relativistic. The proposed model is shown to successfully describe the cosmic history from inflation to late-time acceleration, with the evolution independent of initial conditions, along with the generation of baryon asymmetry during the post-inflationary era.

show abstract

Section: Discussionmentioning

confidence: 51%

The paradigm of warm quintessential inflation and spontaneous baryogenesis

Basak,

Bhattacharya,

Gangopadhyay

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…Also, we note that the future refinement of observational constraints ( 55)- (57) leads to the refinement of the condition on the constant parameters of the considered cosmological Fig. 1 The dependencies r = r (n S ) for the different values of the parameter k with constraints on the tensor-to-scalar ratio r due to the Planck TT,TE,EE+lowE+lensing+BAO+BICEP2/Keck Array observations [12,13] models ( 64) and ( 68) only, and it does not eliminate the possibility for the verification of such models.…”

Section: Parameters Of Cosmological Perturbationsmentioning

confidence: 91%

“…The generalized analysis of cosmological models implying a stiff energy-dominated era with state parameter 1/3 < w S ≤ 1 was considered in [51][52][53][54]. The quintessential inflation implying an additional kinetic energy-dominant stage with w S = 1 was considered, for example, in [55][56][57]. The spectrum of relic gravitational waves corresponding to n T = 0 and w S > 1/3, similar to the case for the proposed cosmological models, was considered in [51].…”

Section: Stiff Energy-dominated Eramentioning

confidence: 99%

See 1 more Smart Citation

Relic gravitational waves in verified inflationary models based on the generalized scalar–tensor gravity

et al. 2022

View full text Add to dashboard Cite

In this work, we consider the models of cosmological inflation based on generalized scalar–tensor theories of gravity with quadratic connection between the Hubble parameter and coupling function. For such a class of the models, we discuss the correspondence between well-known versions of the scalar–tensor gravity theories and physically motivated potentials of a scalar field. It is shown that this class of models corresponds to the Planck observational constraints on the cosmological perturbation parameters for an arbitrary potential of a scalar field and arbitrary version of a scalar–tensor gravity theory. The spectrum of relict gravitational waves is analyzed, and the frequency range corresponding to maximal energy density is determined. The possibility of direct detection of the relic gravitational waves, predicted in such a class of models, by satellite and ground-based detectors is discussed as well.

show abstract

“…It is important to note that in the context of warm inflation [103,104] a separate reheating mechanism may not be required as radiation is being produced during inflation itself due to the coupling of the inflaton field to the radiation bath. The idea of "warm inflation" also works in the context of quintessential inflation as well [92,[105][106][107][108] We shall also mention specific field tracks that could join the two phases of acceleration such that thermal history is left without interference and the late-time physics is insensitive to initial conditions. FIG.…”

Section: Quintessential Inflation: Building Blocksmentioning

confidence: 99%

What is needed of a scalar field if it is to unify inflation and late time acceleration ?

Jaman,

Sami

2022

Preprint

Self Cite

View full text Add to dashboard Cite

Quintessential inflation refers to scenarios in which a single scalar field is used to describe inflation and late-time acceleration. This review is dedicated to the framework of quintessential inflation, with a focus on the building blocks of formalism. Consistent unification of inflation and late time acceleration using a single scalar field asks for a shallow field potential initially followed by steep behaviour thereafter and shallow again around the present epoch. The requirement of non-interference of scalar field with thermal history dictates steep nature of potential in the post-inflationary era, with a further restriction that late time physics be independent of initial conditions. We describe, in detail the scaling and asymptotic scaling solutions and the mechanism of exit from the scaling regime to late time acceleration. Review includes a fresh look at scaling solutions which are central to the theme of unification of inflation and late time acceleration. As for the exit mechanism, special attention is paid to the coupling of massive neutrino matter to the scalar field, which builds up dynamically and can give rise to late time acceleration. We present a detailed analytical treatment of scalar field dynamics in the presence of coupling. We briefly discuss the distinguished feature of quintessential inflation, namely, the blue spectrum of gravity waves produced during the transition from inflation to the kinetic regime.

show abstract

Paradigm of warm quintessential inflation and production of relic gravity waves

Cited by 28 publications

References 63 publications

The paradigm of warm quintessential inflation and spontaneous baryogenesis

The paradigm of warm quintessential inflation and spontaneous baryogenesis

Relic gravitational waves in verified inflationary models based on the generalized scalar–tensor gravity

What is needed of a scalar field if it is to unify inflation and late time acceleration ?

Contact Info

Product

Resources

About