Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Background Independent Field Quantization with Sequences of
  Gravity-Coupled Approximants II: Metric Fluctuations   We apply the new quantization scheme outlined in Phys. Rev. D102 (2020)
125001 to explore the influence which quantum vacuum fluctuations of the
spacetime metric exert on the universes of Quantum Einstein Gravity, which is
regarded an effective theory here. The scheme promotes the principle of
Background Independence to the level of the regularized precursors of a quantum
field theory ("approximants") and severely constrains admissible regularization
schemes. Without any tuning of parameters, we find that the zero point
oscillations of linear gravitons on maximally symmetric spacetimes do not
create the commonly expected cosmological constant problem of a cutoff-size
curvature. On the contrary, metric fluctuations are found to reduce positive
curvatures to arbitrarily tiny and ultimately vanishing values when the cutoff
is lifted. This suggests that flat space could be the distinguished groundstate
of pure quantum gravity. Our results contradict traditional beliefs founded
upon background-dependent calculations whose validity must be called into
question therefore.

28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th