Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Degeneracy Problem in Non-Canonical Inflation   While attempting to connect inflationary theories to observational physics, a
potential difficulty is the degeneracy problem: a single set of observables
maps to a range of different inflaton potentials. Two important classes of
models affected by the degeneracy problem are canonical and non-canonical
models, the latter marked by the presence of a non-standard kinetic term that
generates observables beyond the scalar and tensor two-point functions on CMB
scales. The degeneracy problem is manifest when these distinguishing
observables go undetected. We quantify the size of the resulting degeneracy in
this case by studying the most well-motivated non-canonical theory having
Dirac-Born-Infeld Lagrangian. Beyond the scalar and tensor two-point functions
on CMB scales, we then consider the possible detection of equilateral
non-Gaussianity at Planck-precision and a measurement of primordial
gravitational waves from prospective space-based laser interferometers. The
former detection breaks the degeneracy with canonical inflation but results in
poor reconstruction prospects, while the latter measurement enables a
determination of $n_T$ which, while not breaking the degeneracy, can be shown
to greatly improve the non-canonical reconstruction.

25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc