Small field inflation

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August undefined, 2024

Webb4 apr. 2024 · All single-field inflationary models invoke varying degrees of tuning in order to account for cosmological observations. Mechanisms that generate primordial black holes (PBHs) from enhancement of primordial power at small scales posit inflationary potentials that transiently break scale invariance and possibly adiabaticity over a range of modes. Webb30 mars 2024 · Long standing themes in inflation include the issue of large field vs. small field inflation as well as the question what fraction of phase space leads to sufficient inflation and furthermore is ...

Small field inflation in $$ \mathcal{N} $$ = 1 supergravity with a ...

Webb1 juni 2024 · Since there is a growing interest in studying inflationary models that meet both observational data and Swampland Criteria, the main goal of the present work is to … WebbWe study an axion inflation model recently proposed within the framework of type IIB superstring theory, where we pay a particular attention to a sub-Planckian axion decay constant. Our axion potential can lead to the small field inflation with a small tensor-to-scalar ratio, and a typical reheating temperature can be as low as GeV. lits darty

can anyone explain the difference between large and small field inflation?

Webb12 feb. 2007 · New inflation yields a good fit to the r and n(s) data in a wide range of field and parameter space. Small field inflation yields r<0.16 while large field inflation yields r>0.16 (for N(e)=50). All members of the new inflation family predict a small but negative running -4(n+1) x 10-4<=dn(s)/dlnk<=-2 x 10-4. Webb10 sep. 2024 · We revisit the renormalizable polynomial inflection point model of inflation, focusing on the small field scenario which can be treated fully analytically. In particular, the running of the spectral index is predicted to be α = -1.43 × 10-3 +5.56 × 10-5 (N CMB-65 ), which might be tested in future. Webb12 sep. 2016 · We consider “new inflation” inflationary models at small fields, embedded in minimal $$ \mathcal{N} $$ = 1 supergravity with a single chiral superfield. Imposing a … litschert power booster

Inflation with a class of concave inflaton potentials in Randall ...

Dynamical fine-tuning of initial conditions for small field inflations

WebbOn the other hand, in small-field inflation, where the coarse graining of spacetime into causally connected patches is less refined, it becomes less probable for the right initial condition to be met and consequently for inflation to begin [7]. A realization of this is the overshoot problem in hilltop inflation (or in general, inflection point WebbKeywords: small field, inflation, Braneworld, Planck 2015, reheating temperature. DOI: 10.3103/S002713491705006X 1. INTRODUCTION Recently a great interest has been devoted to the litsea chinensisWebbWe consider ”new inflation” inflationary models at small fields, embedded in minimal N = 1 supergravity with a single chiral superfield. Imposing a period of inflation compati litsea coreana

"Webb9 sep. 2011 · We explore some issues in slow roll inflation in situations where field excursions are small compared to Mp. We argue that for small field inflation, minimizing … " - Small field inflation

Small field inflation

Webb11 aug. 2024 · It is shown that in this class of models the symmetry structure leads to both large and small field inflationary trajectories within a single modular inflation model. The … WebbFör 1 dag sedan · KUALA LUMPUR: Maybank Investment Bank (Maybank IB) has expanded its market coverage with the issuance of structured warrants over stocks listed on the New York Stock Exchange (NYSE), making it ...

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Webb30 mars 2024 · It is shown that in this class of models the symmetry structure leads to both large and small field inflationary trajectories within a single modular inflation … Webb13 nov. 2011 · Using the effective theory of inflation, we propose a generalization of the Lyth bound that applies to models of inflation coupled to Einstein gravity. Our strongest bound applies to all single-field models with two-derivative kinetic terms for the scalar fluctuations and is always stronger than the corresponding bound for slow-roll models.

Webb11 apr. 2024 · WASHINGTON, April 11 (Xinhua) -- March saw U.S. small business optimism fall for the 15th consecutive month, amid worries over record inflation and high interest rates. WebbA scalar field having the Coleman-Weinberg type effective potential arises in various contexts of particle physics and serves as a useful framework for discussing cosmic …

Webb14 okt. 2015 · In this article, I have studied the cosmological and particle physics constraints on a generic class of large field ( Δϕ > M p ) and small field ( Δϕ < M p ) models of brane inflationary magnetic field from: (1) tensor-to-scalar ratio (r), (2) reheating, (3) leptogenesis and (4) baryogenesis in case of Randall-Sundrum single braneworld … Webb6 aug. 2024 · In this work, we perform this integration and we show that there is a region of parameter space where the effective supergravity realises our proposal of small field inflation from supersymmetry...

WebbOur axion potential can lead to the small field inflation with a small tensor-to-scalar ratio, and a typical reheating temperature can be as low as GeV. We study an axion inflation …

Webbför 2 dagar sedan · CHICAGO, April 12 (Xinhua) -- Gold futures on the COMEX division of the New York Mercantile Exchange rose Wednesday as U.S. inflation is smaller than expected. litsea cubeba may changWebb19 sep. 2024 · In the case of small field inflation there is a small window in parameter space of typical potentials such as where a phase of eternal accelerated expansion … litsea cubeba essential oil benefits for skinWebb12 sep. 2016 · A bstract We consider “new inflation” inflationary models at small fields, embedded in minimal \mathcal {N} = 1 supergravity with a single chiral superfield. Imposing a period of inflation compatible with experiment severely restricts possible models, classified in perturbation theory. litsea essential oil shampooWebb6 okt. 2024 · We present a minimal UV complete framework to embed inflation and dark matter by extending the standard model with a singlet real scalar field (the inflaton) and … litsea fruchtWebbIf inflation had been small field, you could imagine that it wasn't sensitive to the details of quantum gravity. The potential could be a wild function with all sorts of features, but we wouldn't need to know those, because the scalar field would only move over such a small region that the potential would look more or less like that nice quadratic one. litsea ghaticaWebb18 nov. 2015 · Abstract: Small-field inflation (SFI) is widely considered to be unnatural because an extreme fine-tuning of the initial condition is necessary for sufficiently large … litsea cubeba essential traductionWebb22 mars 2024 · For the small field inflation, however, we present the parameter decoupling and coupling scenarios. For both scenarios, we compute and inspect n_s and r showing interesting results. For three different values of the number of e-folds N=60,65 and 70, we find that the coupling between f(R,T)1 and the scalar potential via the moduli space … litsea essential oil health benefits