Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Simple simulation for electron energy levels in geometrical potential
  wells   An octopus program is demonstrated to generate electron energy levels in
three-dimensional geometrical potential wells. The wells are modeled to have
shapes similar to cone, pyramid and truncated-pyramid. To simulate the electron
energy levels in quantum mechanical scheme like the ones in parabolic band
approximation scheme, the program is run initially to find a suitable electron
mass fraction that can produce ground-state energies in the wells as close to
those in quantum dots as possible and further to simulate excited-state
energies. The programs also produce wavefunctions for exploring and determining
their degeneracies and vibrational normal modes.

5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex