Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Path Integrals in Quadratic Gravity   Using the invariance of Quadratic Gravity in FLRW metric under the group of
diffeomorphisms of the time coordinate, we rewrite the action $A$ of the theory
in terms of the invariant dynamical variable $g(\tau)\,.$
  We propose to consider the path integrals $\int\,F(g)\,\exp\left\{-A
\right\}dg$ as the integrals over the functional measure
$\mu(g)=\exp\left\{-A_{2} \right\}dg\,,\ $ where $A_{2}$ is the part of the
action $A$ quadratic in $R\,.$ The rest part of the action stands in the
exponent in the integrand as the "interaction" term. We prove the measure
$\mu(g)$ to be equivalent to the Wiener measure, and, as an example, calculate
the averaged scale factor in the first nontrivial perturbative order.

20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int