Small field inflation

Author: lwsu

August undefined, 2024

WebbIf 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. 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 polynomial inflation: reheating, radiative stability and ...

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 … 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. heimo työpaikat

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

Webb25 aug. 2024 · Inflation in RS2 model generally predicts smaller scalar spectral indices and larger tensor-to-scalar ratios compared to standard inflation. However, large tensor-to … 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 … 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 … heimoveljeys

[PDF] Initial conditions for slow-roll inflation in a random Gaussian ...

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Webb22 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 … 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. heimo valkamaWebbWe show that initial conditions for small-field inflation can be determined quantum mechanically by introducing a suitable flattened region in the scalar potential. The … heimo turin karin

"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 … " - 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 … Webb19 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 …

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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, … 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, …

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. WebbWe 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

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 … 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 …

WebbKeywords: small field, inflation, Braneworld, Planck 2015, reheating temperature. DOI: 10.3103/S002713491705006X 1. INTRODUCTION Recently a great interest has been devoted to the

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. heimo välinenWebb1 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 … heimo tv liveWebb7 jan. 2024 · Within General Relativity, a minimally coupled scalar field governed by a quadratic potential is able to produce an accelerated expansion of the universe provided … heimo valaWebb16 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 … heimo välinen oyWebb11 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. heimo vesaWebb30 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 ... heimovirta kokkolaWebbFör 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 ... heimo villanen