Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Inflation from a chaotic potential with a step   In this work we study the effects on relevant observational parameters of an
inflationary universe from a chaotic potential with a step. We evolve
numerically the perturbations equations within both cold and warm inflation. On
the one hand, in a cold inflation scenario we analyse the scalar power spectrum
$P_{\mathcal{R}}$ in terms of the number of e-folds $N_{e}$, and in terms of
the ratio $k/k_{0}$, where $k_{0}$ is our pivot scale. We show how
$P_{\mathcal{R}}$ oscillates around $0.2< k/k_{0} < 20$. Also, we present the
evolution of two relevant parameters: the scalar spectral index $n_{s}$ and the
tensor-to-scalar ratio $r$. Actually, more than one region of $(n_{s},r)$ lies
within the observable window (Planck 2018). On the other hand, in the warm
inflationary instance we present two examples, both related to previous
samples. We examine the evolution of the scalar power spectrum in terms of
$N_{e}$, where it can be observed a growth of its amplitude with respect to
bigger $k/k_{0}$. This result might imply that a warm step potential enhances
the evolution of $P_{\mathcal{R}}$ at larger fluctuation scales. Finally, one
key aspect of this research was to contrast the features of an inflationary
potential between both paradigms; and in fact they show similarities and
differences among various cases. One remarkable upshot in both scenarios is
that certain fluctuation scales are not longer "freeze in" on super-horizon
scales. Thus, this outcome might suggest that purely adiabatic primordial
density perturbations no longer holds at the time of the step. Nonetheless, a
deeper study is needed to assure that entropy production is indeed happening at
super-horizon scales. And on the other hand, warm inflation could function as a
screening mechanism capable of smoothing the feature of the inflationary
potential.

34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat