Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum complex sine-Gordon model on a half line   The quantum complex sine-Gordon model on a half line is studied. The quantum
spectrum of boundary bound states using the the semi-classical method of
Dashen, Hasslacher and Neveu is obtained. The results are compared and found to
agree with the bootstrap programme. A particle/soliton reflection factor is
conjectured, which is consistent with unitary, crossing and our semi-classical
results.

12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
19
The categories of this paper are: eess
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th