Curvature perturbation and waterfall dynamics in hybrid inflation
نویسندگان
چکیده
منابع مشابه
Dante’s Waterfall: A Hybrid Model of Inflation
Given recent observational results from the BICEP2 and Planck collaborations regarding the ratio of power in tensor to scalar modes in the cosmic microwave background radiation, and the implications of this ratio for the possible existence of large gravity waves resulting from inflation, it is of current interest to investigate models of inflation which are capable of producing large gravity wa...
متن کاملGenerating the primordial curvature perturbation from inflation
The scale–independence of the primordial curvature perturbation suggests that it comes from the vacuum fluctuation during inflation of a light scalar field. This field may be the inflaton, or a different ‘curvaton’ field. The observation of primordial non–gaussianity would be a smoking gun for the curvaton model, while the observation of gravitational waves originating during slow–roll inflatio...
متن کاملCurvature perturbation spectrum from false vacuum inflation
In the inflationary cosmology it occurs frequently that the inflaton field is trapped in a local, transient minimum with non-zero vacuum energy. The difficulty regarding the curvature perturbation produced during such a stage is that classically the inflaton does not move so that the comoving hypersurfaces are not well defined at linear order in the scalar field perturbation. In this paper, ass...
متن کاملGenerating the curvature perturbation at the end of inflation
a. Introduction The primordial curvature perturbation ζ exists already a few Hubble times before the observable Universe enters the horizon. Its timeindependent value at that stage sets the initial condition for the subsequent evolution of all perturbations in the scalar and adiabatic mode, which in turn seem to the dominant (perhaps the only) cause of inhomogeneity in the Universe. The curvatu...
متن کاملElliptic Inflation: Generating the curvature perturbation without slow-roll
There are many inflationary models in which inflaton field does not satisfy the slow-roll condition. In such models, it is difficult to generate the curvature perturbation during inflation. Thus, to generate the curvature perturbation, one must introduce another component to the theory. To cite a case, curvatons may generate dominant part of the curvature perturbation after inflation. However, ...
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: Journal of Cosmology and Astroparticle Physics
سال: 2011
ISSN: 1475-7516
DOI: 10.1088/1475-7516/2011/10/015