Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Strongly confined 2D parabolic quantum dot: Biexciton or Quadron?   Excitonic systems localized in a single InAs/GaAs parabolic quantum dot are
studied theoretically using an unrestricted Hartree-Fock method. The binding
energies of excitons, conventional biexcitons and quadrons - four particles
system of two electrons and two holes, in the ground state have been obtained
as functions of magnetic field and confinement potential. It is found that for
strong confinement, while the binding energy of biexciton is negative, the
binding energy of quadron is positive, suggesting the strong lateral
confinement of the parabolic quantum dot supports the formation of a quadron
rather than a biexciton.

9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas