Slow-roll versus stochastic slow-roll inflation
نویسندگان
چکیده
منابع مشابه
Generalized slow-roll inflation
The slow-roll approximation to inflation is ultimately justified by the presence of inflationary attractors for the orbits of the solutions of the dynamical equations in phase space. There are many indications that the inflaton field couples nonminimally to the spacetime curvature: the existence of attractor points for inflation with nonminimal coupling is demonstrated, subject to a condition o...
متن کاملInflation without slow roll
We draw attention to the possibility that inflation (i.e. accelerated expansion) might continue after the end of slow roll, during a period of fast oscillations of the inflaton field φ. This phenomenon takes place when a mild non-convexity inequality is satisfied by the potential V (φ). The presence of such a period of φ-oscillation-driven inflation can substantially modify reheating scenarios....
متن کاملBrane inflation without slow-roll
The scenario of brane inflation without using the conventional slow-roll approximations has been investigated. Based on the mechanism of generating the curvature perturbations at the end of inflation, a new brane inflation paradigm was developed. The conditions for making a sufficiently large enough number of e-foldings and for generating the curvature perturbations without producing dangerous ...
متن کاملSlow-roll Inflation and Cmb Anisotropy Data
We emphasize that the estimation of cosmological parameters from CMB anisotropy data, such as the recent high resolution maps from BOOMERanG and MAXIMA-1, requires assumptions on the primordial spectra. The latter are predicted from inflation. The physically best motivated scenario is slow-roll inflation. However, very often the unphysical power-law inflation scenario is (implicitly) assumed in...
متن کاملTransplanckian energy production and slow roll inflation
In this paper we investigate how the energy density due to a non-standard choice of initial vacuum affects the expansion of the universe during inflation. To do this we introduce source terms in the Friedmann equations making sure that we respect the relation between gravity and thermodynamics. We find that the energy production automatically implies a slow rolling cosmological constant. Hence ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The European Physical Journal C
سال: 2019
ISSN: 1434-6044,1434-6052
DOI: 10.1140/epjc/s10052-019-7409-9