Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gravitating superconducting strings with timelike or spacelike currents   We construct gravitating superconducting string solutions of the U(1)_{local}
x U(1)_{global} model solving the coupled system of Einstein and matter field
equations numerically. We study the properties of these solutions in dependence
on the ratio between the symmetry breaking scale and the Planck mass. Using the
macroscopic stability conditions formulated by Carter, we observe that the
coupling to gravity allows for a new stable region that is not present in the
flat space-time limit. We match the asymptotic metric to the Kasner metric and
show that the relations between the Kasner coefficients and the energy per unit
length and tension suggested previously are well fulfilled for symmetry
breaking scale much smaller than the Planck mass. We also study the solutions
to the geodesic equation in this space-time. While geodesics in the exterior
space-time of standard cosmic strings are just straight lines, test particles
experience a force in a general Kasner space-time and as such bound orbits are
possible.

16
The categories of this paper are: stat
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys