Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Precise measurements of inflationary features with 21 cm observations   Future observations of 21~cm emission using HI intensity mapping will enable
us to probe the large scale structure of the Universe over very large survey
volumes within a reasonable observation time. We demonstrate that the
three-dimensional information contained in such surveys will be an extremely
powerful tool in searching for features that were imprinted in the primordial
power spectrum and bispectrum during inflation. Here we focus on the "resonant"
and "step" inflation models, and forecast the potential of upcoming 21~cm
experiments to detect these inflationary features in the observable power- and
bispectrum. We find that the full scale Tianlai experiment and the Square
Kilometre Array (SKA) have the potential to improve on the sensitivity of
current Cosmic Microwave Background (CMB) experiments by several orders of
magnitude.

0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
26
The categories of this paper are: bayes-an