Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charged black holes in string-inspired gravity: II. Mass inflation and
  dependence on parameters and potentials   We investigate the relation between the existence of mass inflation and model
parameters of string-inspired gravity models. In order to cover various models,
we investigate a Brans-Dicke theory that is coupled to a U(1) gauge field. By
tuning a model parameter that decides the coupling between the Brans-Dicke
field and the electromagnetic field, we can make both of models such that the
Brans-Dicke field is biased toward strong or weak coupling directions after
gravitational collapses. We observe that as long as the Brans-Dicke field is
biased toward any (strong or weak) directions, there is no Cauchy horizon and
no mass inflation. Therefore, we conclude that to induce a Cauchy horizon and
mass inflation inside a charged black hole, either there is no bias of the
Brans-Dicke field as well as no Brans-Dicke hair outside the horizon or such a
biased Brans-Dicke field should be well trapped and controlled by a potential.

23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
35
The categories of this paper are: mtrl-th