Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Potential energy curves for P2 and P2+ constructed from a strictly
  N-representable natural orbital functional   The potential energy curves of P2 and P2+ have been calculated using an
approximate, albeit strictly N-representable, energy functional of the
one-particle reduced density matrix: PNOF5. Quite satisfactory accord is found
for the equilibrium bond lengths and dissociation energies for both species.
The predicted vertical ionization energy for P2 by means of the extended
Koopmans' theorem is 10.57 eV in good agreement with the experimental data.
Comparison of the vibrational energies and anharmonicities with their
corresponding experimental values supports the quality of the resultant
potential energy curves.

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The categories of this paper are: chao-dyn
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
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The categories of this paper are: comp-gas
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The categories of this paper are: eess
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The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th