Slow-roll inflation wikipedia

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Webb14 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 roll parameters are large and modes no longer freeze out shortly after exiting the horizon, treating both cases analytically. We then consider applications to transient phases … 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 …

[2012.02518] An analytic approach to non-slow-roll inflation

Webb27 apr. 2024 · The inflationary potential for the constant slow-roll inflation is then reconstructed in the framework of both general relativity and scalar-tensor theory of gravity, and compared with the recently reconstructed E model potential. In the strong coupling limit, we show that the $\eta$ attractor is reached. WebbNorth America [ edit] In the United States, the Consumer Price Index rose 6.8% between November 2024 and November 2024, spurred by price increases for gasoline, food, and housing. [82] Higher energy costs caused the inflation to rise further in 2024, [83] reaching 9.1%, a high not seen since 1981. [84] truth social outlet

Slow roll (aeronautics) - Wikipedia

Webb5 apr. 2024 · The slow-roll conditions are conditions on the parameters and the initial conditions for the fields. Imposing also the number of e-folds, usually results in conditions on the parameters only. V=ge^ {-\lambda \phi } gives an exact solution for inflation, on … WebbPresidency of Joe Biden January 20, 2024 – present Cabinet See list Party Democratic Election 2024 Seat White House ← Donald Trump Seal of the President Official website This article is part of a series about Joe Biden Political positions Electoral history Early life and career Eponyms Family Honors Public image U.S. Senator from Delaware Judiciary … Webb13 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 truth social on windows

Inflation (cosmology) - Wikipedia

Webb15 okt. 2013 · Slow-roll inflation is alive and well, unlike models which involve tunneling between two vacua. The model of inflation first proposed by Alan Guth back in 1980 was … WebbSlow Roll Inflation. AbstractIn this work we analyze how the spectrum of primordial scalar perturbations is modified, within the emergent universe scenario, when a particular version of the Continuous Spontaneous Localization (CSL) model is incorporated as the generating mechanism of initial perturbations, providing also an explanation to the ... truth social on windows pcWebbSlow roll inﬂation Pascal Vaudrevange [email protected] October 26, 2010 1 What is inﬂation? Inﬂation is a period of accelerated expansion of the universe. … philip shyatt chef

"Webb4 aug. 1994 · The meaning of the inflationary slow-roll approximation is formalised. Comparisons are made between an approach based on the Hamilton-Jacobi equations, … " - Slow-roll inflation wikipedia

Slow-roll inflation wikipedia

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. Webb10 dec. 2024 · Ultra-slow-roll (USR) inflation is a new mode of inflation which corresponds to the occasions when the inflaton field must traverse an extremely flat part of the scalar potential, when the usual slow-roll (SR) fails. We investigate USR and obtain an estimate for how long it lasts, given the initial kinetic density of the inflaton.

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WebbThe next generation of cosmological observations will be sensitive to small deviations from a pure power law in the primordial power spectrum of the curvature perturbations. In the context of slow-roll inflation, these… Webb14 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 …

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 WebbHiggs Inflation When , the potential is flat and slow roll inflation can occur. However it is found that we need to obtain the correct amplitude of density fluctuations. Potential in the Einstein frame. The allowed WMAP region for inflationary parameters spectral …

Webb8 okt. 2024 · Slow-roll inflation in f (R,T) gravity and a modified Starobinsky-like inflationary model Mauricio Gamonal In this work, we studied the slow-roll … Webb4 dec. 2024 · An analytic approach to non-slow-roll inflation Gianmassimo Tasinato Brief periods of non-slow-roll evolution during inflation can produce interesting observable …

Webb16 juli 2024 · Download PDF Abstract: A study of the slow-roll inflation for an exponential potential in the frame of the scalar-tensor theory is performed, where non-minimal kinetic coupling to curvature and non-minimal coupling of the scalar field to the Gauss-Bonnet invariant are considered. Different models were considered with couplings given by …

Webb22 okt. 2024 · Abstract: Slow-roll inflation is analyzed in the context of modified gravity within the Palatini formalism. As shown in the literature, inflation in this framework … philips hx9924/17Webb1 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. philips hy1100WebbThe Boeing 787 Dreamliner is an American wide-body jet airliner developed and manufactured by Boeing Commercial Airplanes.After dropping its unconventional Sonic Cruiser project, Boeing announced the conventional 7E7 on January 29, 2003, which focused largely on efficiency. The program was launched on April 26, 2004, with an order … truth social open dateWebbslow 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 ... truth social outageWebbMed inflation menas vanligtvis att penningvärdet minskar. Den ursprungliga definitionen är "ökning av penningmängden [ 1] ". När penningmängden ökar kraftigt så minskar i regel penningvärdet. En effekt av inflation är att den allmänna prisnivån stiger, varför inflation ofta mäts med konsumentprisindex och uppfattas av många som ... truth social online accessWebbför 2 dagar sedan · Inflation as measured by the Consumer Price Index (CPI), soared by a 5.0% year-over-year increase in March, less than the year-over-year increase of 6.0% in February. That unadjusted change is ... truth social on the webThe basic model of inflation proceeds in three phases: • Expanding vacuum state with high potential energy • Phase transition to true vacuum • Slow roll and reheating truth social open source code