Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Deciphering Inflation with Gravitational Waves: Cosmic Microwave
  Background Polarization vs. Direct Detection with Laser Interferometers   A detection of the primordial gravitational wave background is considered to
be the ``smoking-gun '' evidence for inflation. While super-horizon waves are
probed with cosmic microwave background (CMB) polarization, the relic
background will be studied with laser interferometers. The long lever arm
spanned by the two techniques improves constraints on the inflationary
potential and validation of consistency relations expected under inflation. If
gravitational waves with a tensor-to-scalar amplitude ratio greater than 0.01
are detected by the CMB, then a direct detection experiment with a sensitivity
consistent with current concept studies should be pursued vigorously. If no
primordial tensors are detected by the CMB, a direct detection experiment to
understand the simplest form of inflation must have a sensitivity improved by
two to three orders of magnitude over current plans.

27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys