Slow-roll inflation wikipedia
Webbslow roll parameters. 5 Slow roll attractor for m 2φ Generically, the models of scalar field inflation pos-sess attractor solutions. We shall now examine these in the case of m 2φ inflation. We start off with the Lagrangian L φ = 1 2 φ˙2 − m2 2 φ2, (26) to find the equations of motion φ¨+3Hφ˙ +mφ = 0, (27) H2 = 1 6 φ˙2 ... Webbslow-roll parameters, see, e.g., [13] for a detailed review. So far, various models achieve these aims by designing a short phase of inflationary nonattractor evolution. In one class of models, the first slow-roll parameter ϵ1 ¼ −H=H_ 2 remains small, while the absolute value of the second slow-roll parameter ϵ2 ¼ ϵ_1=ðHϵ1Þ is large ...
Slow-roll inflation wikipedia
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Webb11 mars 2024 · It then rolls very slowly along the potential. This is the slow-roll approximation and has been recognized as a practical way to realize inflation. In this … WebbIn new inflation, the slow-roll conditions must be satisfied for inflation to occur. The slow-roll conditions say that the inflaton potential must be flat (compared to the large vacuum …
Webb23 apr. 2024 · We investigate slow-roll inflation in a multi-field random Gaussian landscape. The landscape is assumed to be small-field, with a correlation length much smaller than the Planck scale. Inflation then… Expand 19 PDF View 8 excerpts, cites methods and background Inflation in random landscapes with two energy scales Webbwith his “chaotic inflation” model [8]. This model still used a slow-roll potential, but did not require any particular level of pre-inflation energy density uniformity. Subsequent research has led to inflation becoming generally accepted as the strongest current candidate which offers solutions to the cosmological puzzles.
Webb3 nov. 2024 · Slow roll inflation Cosmic inflation was a period of extremly high dark energy density in the early universe (and almost no "ordinary" mass/energy), so high that any normal piece of matter today, or even a neutron star, … Webb8 dec. 2024 · In order to produce an accelerating expansion (desirable for inflation and dark energy models) using a scalar field, that field must be slowly rolling. The two slow-roll parameters are defined as ϵ = 1 κ 2 ( V, ϕ V) 2, η = V, ϕ ϕ κ 2 ϕ, where κ = 8 π G, ϕ is the scalar field and V its potential.
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Webb1 jan. 2024 · Slow-roll inflation in general relativity The classical theory of General Relativity (GR), developed by Einstein [24]has been the most accurate model to study the gravitational interaction, and it has been experimentally verified several times. little alchemy 2 allWebb5 jan. 2024 · The ultra-slow-roll (USR) inflation represents a class of single-field models with sharp deceleration of the rolling dynamics on small scales, leading to a significantly … little alchemy 2 answer keyWebb20 apr. 2016 · The slow roll approximation simplifies the equations of motion and guarantees that inflation will occur. However, as the text you have quoted states, it is also possible to have inflation without resorting to the slow roll approximation. Share Cite Improve this answer Follow edited Apr 20, 2016 at 16:42 answered Apr 19, 2016 at 18:36 little alchemy 2 all weaponsWebb22 jan. 2013 · Ultra slow-roll inflation has recently been used to challenge the non-Gaussianity consistency relation. We show that this inflationary scenario belongs to a one-parameter class of models, and we study its properties and observational predictions. We demonstrate that the power spectrum remains scale invariant and that the bispectrum is … little alchemy 2 arcticWebb14 aug. 2015 · Large Slow Roll Parameters in Single Field Inflation Jessica L. Cook, Lawrence M. Krauss We initially consider two simple situations where inflationary slow … little alchemy 2 all elementsWebb13 sep. 2024 · Genericness of pre-inflationary dynamics and probability of the desired slow-roll inflation in modified loop quantum cosmologies Bao-Fei Li, Parampreet Singh, and Anzhong Wang Phys. Rev. D 100 , 063513 – Published 13 September 2024 little alchemy 2 animalWebb6 aug. 2024 · The "non-slow-roll" inflation is the original model developed by Alan Guth in 1981 usually referred to as the old inflation (with slow-roll inflationary model being the … little alchemy 2 armor