Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Semiclassical Gravitoelectromagnetic inflation in a Lorentz gauge:
  seminal inflaton fluctuations and electromagnetic fields from a 5D vacuum
  state   Using a semiclassical approach to Gravitoelectromagnetic Inflation (GEMI), we
study the origin and evolution of seminal inflaton and electromagnetic fields
in the early inflationary universe from a 5D vacuum state. The difference with
other previous works is that in this one we use a Lorentz gauge. Our formalism
is naturally not conformal invariant on the effective 4D de Sitter metric,
which make possible the super adiabatic amplification of magnetic field modes
during the early inflationary epoch of the universe on cosmological scales.

29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin