Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Creation/annihilation of wormholes supported by the Sine-Gordon phantom
  (ghost) field   The possible process of creation/annihilation of traversable wormholes in the
model with phantom (ghost) scalar field is described. It is shown that such
process can be realized only for some special choice of a potential energy, in
particular, for the Sine-Gordon potential.

8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat