Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gravitational waves from inflation with antisymmetric tensor field   We build upon the past studies of inflation with rank-2 antisymmetric tensor
field, including here the tensor perturbations to metric. We perform a
comprehensive analysis of the background dynamics of our model in the presence
of non-minimal coupling curvature terms $R$ and $R_{\mu \nu}$. We find
appropriate conditions on the nonminimal coupling parameters to satisfy the
constraint of speed of propagation of gravitational waves. Including the tensor
perturbations, the model is found to be free from ghost instabilities with
minimal constraints on the parameters. We also study the evolution of
gravitational waves, calculate the power spectrum and the tensor spectral
index.

22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph