Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Propagation of Gravitational Waves in Anisotropic Universe   In this paper, we have considered a toy model of an anisotropic universe and
studied the propagation of gravitational waves in such a universe. The
consideration of this toy model simplifies the analysis and helps us to
illustrate the effects of anisotropy. Incorporating linear perturbations on
this anisotropic background, we have considered the synchronous, transverse,
traceless gauge conditions and evaluated the perturbations of the Ricci tensor.
The energy-momentum tensor is that of a perfect fluid, for which the Einstein's
field equations are determined in presence of perturbations. We arrive at the
set of linearised Einstein's equations explicitly and find solutions for
gravitational waves propagating along the direction of anisotropy. We also
study the propagation along a direction perpendicular to the direction of
anisotropy. Subsequently we have validated the assumption of the tracelessness
of the linear perturbations. Finally we determine the amount of tidal
acceleration caused by the propagation of gravitational waves in this
background spacetime.

26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics