Slow roll approximation
Webbapproximate solutions with these types of dynamics for various types of gravity theories. For the case of f(R)-gravity on the basis of the exact solutions and ones obtained in slow-roll approximation it is shown that widely discussed Starobinsky [1,39,40,64–66] and non-minimal Higgs [67–69] inflationary WebbIn inflationary theory, many papers start off by making the slow-roll approximation, on which many things depend. This approximation is usually presented by requiring that two 'slow-roll parameters' are small: ϵ V ≡ 1 16 π G ( V ′ V) 2 ≪ 1. η V ≡ 1 8 π G ( V ″ V) ≪ 1.
Slow roll approximation
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Webb3 apr. 2014 · Testing the slow-roll approximation, Hybrid Natural Inflation and the tensor index with BICEP2 Authors: Mariana Carrillo Gonzalez Imperial College London Gabriel Germán Universidad Nacional... WebbSlow-roll inflation and the primordial metric perturbation spectrum . MSc Thesis September 2009 . Author: Trevor Peter Hardcastle . Imperial College London . Abstract . Inflation is …
Webb23 jan. 2024 · The slow-roll approximation is an analytical approach to study dynamical properties of the inflationary universe. In this article, systematic construction of the slow-roll expansion for effective loop quantum cosmology is presented. Webb29 juni 2024 · For the slow-roll approximation the scalar field behaves as an effective dark energy. The form of the potential is clearly unknown and many different potentials have been studied and confronted with observations. These two regimes of accelerated expansion are treated independently.
Webb16 juli 2024 · By taking the slow-roll approximation, we generated interesting scenarios where a Klein Gordon potential leads to observationally consistent inflation observables. Our results make it clear-cut that in addition to the Ricci scalar and scalar fields, the trace of energy momentum tensor also plays a major role in driving inflationary scenarios. Webb19 jan. 2010 · We develop a variant of the generalized slow roll approach for calculating the curvature power spectrum that is well suited for order unity deviations in power …
Webb1 jan. 2024 · The slow-roll approximation is an analytical approach to study dynamical properties of the inflationary universe. In this article, systematic construction of the …
Webbthe slow roll parameter η. τ on the other hand is also used to denote the optical depth to the surface of last scattering... A photon travels a coordinate distance τ during conformal … green peapod thai mchenryWebbSlow roll approximation in quantum cosmology Oliver Janssen Center for Cosmology and Particle Physics, New York University, New York, NY 10003, USA Abstract fly script roblox guifly script untitled hoodWebb1 okt. 2024 · Slow roll inflation requires that the effective inflaton mass should be much smaller than the Hubble parameter during inflation, that is m2 ≪ H2. However, when we try to build an inflation model in the framework of string theory or supergravity, one often encounter an Hubble induced inflaton mass, that is m2 ∼ H2[1], [2]. fly script synapse xWebbThe Slow-Roll Approximation 0 = LO0 p 1− 1 /3, and iteratively applies d which is again a direct consequence of Eq. (2.19). Doing so, one obtains NNLO0 = LO0 Let us move on to the slow-roll trajectory. At next-to-leading order, it proceeds from combining Eq. (2.19) and Eq. (2.22), which gives rise to ∆N SRNLO =− 1 green peapod watertown maWebb14 aug. 2024 · In this framework and assuming the slow-roll approximation, a possible methodology for the reconstruction of inflation is the parametrization of these cosmological quantities or parameters in terms of the number of e- folds N. green peapod thai restaurantWebb15 dec. 1994 · The meaning of the inflationary slow-roll approximation is formalized. Comparisons are made between an approach based on the Hamilton-Jacobi equations, … fly script op