Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-hermitian models in higher dimensions   It is know that PT-symmetric models have real spectra provided the symmetry
is not spontaneously broken. Even pseudo-hermitian models have real spectra,
which enlarge the the class of non-hermitian models possessing real spectra. We
however consider non-hermitian models in higher dimensions which are not
necessarily explicit PT-symmetric nor pseudo-hermitian. We show that the models
may generate real spectra depending upon the coupling constants of the
Hamiltonian. Our models thus further generalize the class of non-hermitian
systems, which possess real spectra.

16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex