Perturbative unitarity in quasi-single field inflation
Sign Up to like & getrecommendations! Published in 2021 at "Journal of High Energy Physics"
DOI: 10.1007/jhep07(2021)018
Abstract: Abstract We study implications of perturbative unitarity for quasi-single field inflation with the inflaton and one massive scalar. Analyzing high energy scattering, we show that non-Gaussianities with |fNL| ≳ 1 cannot be realized without turning… read more here.
Keywords: perturbative unitarity; quasi single; field inflation; single field ... See more keywords
Compactly supported linearised observables in single-field inflation
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2017/07/043
Abstract: We investigate the gauge-invariant observables constructed by smearing the graviton and inflaton fields by compactly supported tensors at linear order in general single-field inflation. These observables correspond to gauge-invariant quantities that can be measured locally.… read more here.
Keywords: gauge invariant; field inflation; single field; compactly supported ... See more keywords
Unsuppressed Primordial Standard Clocks in Warm Quasi-single Field Inflation
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2018/06/013
Abstract: We study the non-Gaussianities in quasi-single field inflation with a warm inflation background. The thermal effects at small scales can sufficiently enhance the magnitude of the primordial standard clock signal. This scenario offers us the… read more here.
Keywords: field inflation; field; quasi single; primordial standard ... See more keywords
New shapes of primordial non-Gaussianity from quasi-single field inflation with multiple isocurvatons
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review D"
DOI: 10.1103/physrevd.100.043534
Abstract: We study a simple extension of quasi-single field inflation in which the inflaton interacts with multiple extra massive scalars known as isocurvatons. Due to the breaking of time translational invariance by the inflaton background, the… read more here.
Keywords: single field; inflation; field inflation; multiple isocurvatons ... See more keywords
Shift-symmetric orbital inflation: Single field or multifield?
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review D"
DOI: 10.1103/physrevd.102.021302
Abstract: We present a new class of two-field inflationary attractor models, known as `shift-symmetric orbital inflation', whose behaviour is strongly multi-field but whose predictions are remarkably close to those of single-field inflation. In these models, the… read more here.
Keywords: field; single field; inflation; symmetric orbital ... See more keywords
Primordial black holes from Gauss-Bonnet-corrected single field inflation
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review D"
DOI: 10.1103/physrevd.104.083545
Abstract: Primordial blackholes formed in the early Universe via gravitational collapse of over-dense regions may contribute a significant amount to the present dark matter relic density. Inflation provides a natural framework for the production mechanism of… read more here.
Keywords: field inflation; primordial blackholes; gauss bonnet; single field ... See more keywords
Constraints on Single-Field Inflation from the BOSS Galaxy Survey.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review letters"
DOI: 10.1103/physrevlett.129.021301
Abstract: Nonlocal primordial non-Gaussianity (NLPNG) is a smoking gun of interactions in single-field inflationary models and can be written as a combination of the equilateral and orthogonal templates. We present the first constraints on these from… read more here.
Keywords: field inflation; galaxy; inflation boss; constraints single ... See more keywords
Dynamics of single-field inflation in the framework of holographic f(T) gravity
Sign Up to like & getrecommendations! Published in 2018 at "International Journal of Geometric Methods in Modern Physics"
DOI: 10.1142/s0219887818501670
Abstract: In the work reported in the present paper, we have considered the inflationary dynamics inspired by holographic Ricci dark energy (HRDE) with the energy density ρΛ = 3β2(Ḣ + 2H2) in the framework of f(T)… read more here.
Keywords: field inflation; framework; dynamics single; gravity ... See more keywords
Implications of single field inflation in general cosmological scenarios on the nature of dark energy given the swampland conjectures
Sign Up to like & getrecommendations! Published in 2021 at "International Journal of Geometric Methods in Modern Physics"
DOI: 10.1142/s0219887821502315
Abstract: Swampland Conjectures have attracted quite some interest in the Cosmological Community. They have been shown to have wide ranging implications, like constraints on inflationary models, primordial black holes, etc. to name a few. A particularly… read more here.
Keywords: swampland conjectures; dark energy; single field;