Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-perturbative quantum effects in stringy degenerate geometries:
  Vacuum created pair of $(D{\bar D})_3$-brane by a two form   We obtain axionic charged primordial black holes on a vacuum created
gravitational pair of $(3{\bar 3})$-brane by the Kalb-Ramond field on a
$D_4$-brane in presence of a background open string metric. The new geometries
on an emergent pair of $(3{\bar 3})$-brane universe is shown to be influenced
by the non-perturbative quantum effects underlying a geometric torsion in a
second order formalism. The presence of small extra dimensions transverse to
the pair in the formalism ensures dynamical scalar fields hidden to a $3$-brane
or an anti 3-brane universe. We investigate the non-perturbative quantum vacua
for their characteristic properties to explain the accelerated expansion of our
universe. Interestingly the emergent brane universe is shown to possess its
origin in a degenerate stringy de Sitter vacua at an early epoch. A
non-perturbative $D_p$-brane world volume correction for $p < 3$ is worked out
to explain some of the quantum effects underlying a quintessence axion in the
string-brane setup. Our analysis reveals that a $D$-instanton can be a
potential candidate to source the dark energy in our brane universe.

19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph