Small field inflation

Author: goyc

August undefined, 2024

Webb13 mars 2013 · We show that small-field inflation occurs exponentially more often than large-field inflation The power of primordial gravitational waves from inflation is generically tied to the scale of inflation. For small-field … 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 …

Dynamical fine-tuning of initial conditions for small field inflations

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 … Webb18 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 … phoenix suns arena new name

Polynomial inflation and dark matter SpringerLink

WebbWe study small field models of inflation, which, against previous expectations, yield significant Gravitational Wave (GW) signal while reproducing other measured observable quantities in the... Webb23 apr. 2024 · We investigate the tunneling process and calculate the probability distribution for the initial conditions and for the number of e-folds of slow-roll inflation, … 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. tts drying rack

Constraining brane inflationary magnetic field from cosmoparticle ...

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Webb14 juni 2024 · We show that the gauge field excitations on a set of coincident D7 branes, itself critical for moduli stabilization and hence intrinsic to inflation in string theory, coupled with axion fields from bulk fluxes, can act as a spectator sector during inflation. 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 … phoenix suns black and whiteWebb4 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. tts dry wipe pen

"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

Small field inflation

WebbWe consider the robustness of small-field inflation in the presence of scalar field inhomogeneities. Previous numerical work has shown that if the scalar potential is flat only over a narrow interval, such as in commonly considered inflection-point models, even small-amplitude inhomogeneities present at the would-be onset of inflation at τ = τi can … Webb16 dec. 2024 · We focus on the behaviours of small field of an arctangent potential form, in Randall–Sundrum II braneworld. Within this framework, there is only one brane with positive tension while the second membrane is sent to infinity, and the configuration the model allows to localize the gravity on the curvature of the bulk. In that context, we …

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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. Webb29 okt. 2024 · Large classes of standard single-field slow-roll inflationary models consistent with the required number of e-folds, the current bounds on the spectral index of scalar perturbations, the tensor-to-scalar ratio, and the scale of inflation can be efficiently constructed using genetic algorithms.

Webb6 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 … Webb1 juni 2012 · We explore some issues in slow roll inflation in situations where field excursions are small compared to M {sub p}. We argue that for small field inflation, minimizing fine tuning requires low energy supersymmetry and a tightly constrained structure. Hybrid inflation is almost an inevitable outcome.

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. Webb1 juni 2012 · We argue that for small field inflation, minimizing fine tuning requires low energy supersymmetry and a tightly constrained structure. Hybrid inflation is almost an …

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. phoenix suns basketball tradesWebbWe show that initial conditions for small-field inflation can be determined quantum mechanically by introducing a suitable flattened region in the scalar potential. The … ttsec easiWebb21 feb. 2024 · Reheating via the inflation sector decays to right-handed neutrinos is considered. An upper bound on the reheating temperature T R ≲2×1011(1×1013) GeV, for large (small) field inflation, will suppress contributions from one-loop quantum corrections to the inflation potential. tts download voiceWebb1 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 … tts dwarf audioWebb10 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, … phoenix suns cameron payne injuryWebb19 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 … tts dynamics phoenix suns broadcast schedule