Slow roll approximation
Webb15 dec. 1994 · The meaning of the inflationary slow-roll approximation is formalized. Comparisons are made between an approach based on the Hamilton-Jacobi equations, … WebbThe 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
Slow roll approximation
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Webb1 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]. Webb28 maj 2024 · Nevertheless, the procedure can be simplified if one imposes the slow-roll approximation and introduces the slow-roll parameters [ 83 ], either in the case where …
Webb16 dec. 2024 · When the slow-roll approximation is violated in constant-roll inflation, the scalar and tensor perturbations equations derived in the slow-roll approximation case also require modification.
Webbwithout slow-roll approximation Jinn-Ouk Gong∗ Department of Physics, KAIST, Daejeon, Republic of Korea International Center for Astrophysics, KASI, Daejeon, Republic of Korea† October 16, 2024 Abstract We study an inflationary scenario where thermal inflation is followed by fast-roll inflation. Webbapproximation(SRA); this assumes that a term can be neglected in each of the equations of motion to leave the simpler set (41) (42) If we define slow-roll parameters[3] (43) where …
Webb1 nov. 2024 · We formulate solutions of dissipation coefficient, inflaton field, scalar & tensor (S/T) power spectra, spectral index in an environment of slow-roll approximation to discuss existence of warm week and strong inflation The completability of our results are checked in correspond to 2024 Planck data. It is seen through graphical Abstract
Webbslow-roll approximation, which is expected to be accurate to a few percent or better. From these expressions, we can compute the spectral indices [8]: ns ≃ 1− 6ǫ+ 2η ; nt ≃ −2ǫ. (24.6) Another useful quantity is the ratio of the two spectra, defined by r ... how do you delete a playlist on youtubeWebbThe ‘slow-roll approximation’ [3, 4, 5], which neglects the most slowly changing terms in the equations of motion, is the most widely used. Although this approximation works well in … how do you delete a playlist on spotifyWebb3 apr. 2014 · the slow-roll approximation and in ligh t of the data from BICEP2. Along the wa y, w e find general consistency relations at which observ ables are sub ject if the … how do you delete a page you created on fbWebb23 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. how do you delete a photo album on iphoneWebb26 okt. 2000 · Inflationary predictions for the anisotropy of the cosmic microwave background radiation are often based on the slow-roll approximation. We study the … phoenix easement dedicationWebb5 apr. 2024 · We re-express all slow-roll parameters, slow-roll conditions and the acceleration condition in NLS form. The WKB approximation in the NLS formulation is also discussed while simplifying to the linear case. Most of the Schr¨odinger potentials in the NLS formulation are very slowly varying; hence the WKB approximation is valid in some … phoenix earthship for saleWebb6 apr. 2024 · The values (b, χ) are reached by an instanton we have described if they lie on a slow-roll trajectory (a Re, ϕ Re) which has passed through for some where the slow-roll … how do you delete a post on instagram