Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonlinear extensions of gravitating dyons: from NUT wormholes to
  Taub-Bolt instantons   Recent work has shown the existence of a unique nonlinear extension of
electromagnetism which preserves conformal symmetry and allows for the freedom
of duality rotations. Moreover, black holes and gravitational waves have been
found to exist in this nonlinearly extended electrovacuum. We generalise these
dyonic black holes in two major ways: with the relaxation of their horizon
topology and with the inclusion of magnetic mass. Motivated by recent attention
to traversable wormholes, we use this new family of Taub-NUT spaces to
construct AdS wormholes. We explore some thermodynamic features by using a
semi-classical approach. Our results show that a phase transition between the
nut and bolt configurations arises in a similar way to the Maxwellian case.

22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat