Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gravitational Flux Tubes   By studying multidimensional Kaluza-Klein theories, or gravity plus U(1) or
SU(2) gauge fields it is shown that these theories possess similar flux tube
solutions. The gauge field which fills the tube geometry of these solutions
leads to a comparision with the flux tube structures in QCD. These solutions
also carry a ``magnetic'' charge, Q, which for the SU(2) Einstein-Yang-Mills
(EYM) system exhibits a dual relationship with the Yang-Mills gauge coupling,
g, ($Q=1/g$). As $Q \to 0$ or $Q \to \infty$, $g \to \infty$ or $g \to 0$
respectively. Thus within this classical EYM field theory we find solutions
which have features - flux tubes, magnetic charges, large value of the gauge
coupling - that are similar to the key ingredients of confinement in QCD.

25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
2
The categories of this paper are: math