Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum Linear Gravity in de Sitter Universe On Bunch-Davies vacuum
  state   In de Sitter ambient space formalism, the linear gravity can be written in
terms of a minimally coupled scalar field and a polarization tensor. In this
formalism, the massless minimally coupled scalar field can be quantized on
Bunch-Davies vacuum state, that preserves the de Sitter invariance, the
analyticity and removes the infrared divergence. The de Sitter quantum linear
gravity is then constructed on Bunch-Davies vacuum state, which is also
covariant, analytic and free of any infrared divergences. We will conclude that
the unique Bunch-Davies vacuum state can be used adequately to constructing the
quantum field theory in de Sitter universe.

27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci