Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New Shell Structure Originated from the Combination of Quadrupole and
  Octupole Deformations   Semiclassical analysis of the shell structure for a reflection-asymmetric
deformed oscillator potential with irrational frequency ratio
$\omega_\perp/\omega_z=\sqrt{3}$ is presented. Strong shell effects associated
with bifurcations of short periodic orbits are found, which occur for a
combination of quadrupole and octupole deformations.

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The categories of this paper are: bayes-an
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The categories of this paper are: alg-geom
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The categories of this paper are: quant-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
1
The categories of this paper are: cs
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The categories of this paper are: patt-sol
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The categories of this paper are: cmp-lg
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The categories of this paper are: astro-ph
3
The categories of this paper are: physics
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The categories of this paper are: comp-gas
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The categories of this paper are: solv-int
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The categories of this paper are: plasm-ph