http://grounddown.uchicago.edu/~whu/Courses/Ast448_12/psI2.pdf Webb1 dec. 2024 · 6. Concluding remarks. The reconstruction of inflationary universe in the context of k-essence model is studied by assuming unification between the swampland condition and attractor given by scalar spectral index with slow roll parameters ε as a …

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Webbcoincides with the inflationary slow-roll parameter, = 1 2(V 0=V)2, if the scalar field dominates the expansion: H2 ’ V=3. Eq. (7) is a quintessence counterpart of the inflationary slow-roll condition (V0=V)2 ˝ 1. Similar to the case of inflation, the … Webb14 aug. 2015 · When multiple slow roll parameters are large the behavior in general is more complicated, but we nevertheless show in the `fast-roll' inflation case, modes grow outside the horizon. We initially consider two simple situations where inflationary slow roll … candy pickering

Slow roll parameters Physics Forums

Webb23 maj 2016 · A general scalar–tensor theory can be formulated in different parametrizations that are related by a conformal rescaling of the metric and a scalar field redefinition. We compare formulations of slow-roll regimes in the Einstein and Jordan … 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 … WebbToday, the radiation energy density ρr(t0) is of the order of (10−4eV)4.If the early universe reached the order of the Planck density (1018GeV)4 at the Planck time t P, then at that time the ratio was ρeff k (tP) ρr(tP) (10−4eV)2 (1018GeV)2 ∼ 10−62. (12) Even if the universe … fish with curly hair