Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Primordial fluctuations from quantum gravity   We study fluctuations and correlations between spacial regions, generated by
the primordial quantum gravitational phase of the universe. We do so by a
numerical evaluation of Lorentzian amplitudes in Loop Quantum Gravity, in a
non-semiclassical regime. We find that the expectation value of the quantum
state of the geometry emerging from the early quantum phase of the universe is
a homogeneous space but fluctuations are very large and correlations are
strong, although not maximal. In particular, this suggests that early quantum
gravitational effects could be sufficient to solve the cosmological horizon
problem.

14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex