Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Local random phase approximation with projected oscillator orbitals   An approximation to the many-body London dispersion energy in molecular
systems is expressed as a functional of the occupied orbitals only. The method
is based on the local-RPA theory. The occupied orbitals are localized molecular
orbitals and the virtual space is described by projected oscillator orbitals,
i.e. functions obtained by multiplying occupied localized orbitals with solid
spherical harmonic polynomials having their origin at the orbital centroids.
Since we are interested in the long-range part of the correlation energy,
responsible for dispersion forces, the electron repulsion is approximated by
its multipolar expansion. This procedure leads to a fully non-empirical
long-range correlation energy expression. Molecular dispersion coefficients
calculated from determinant wave functions obtained by a range-separated hybrid
method reproduce experimental values with less than 15% error.

31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
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The categories of this paper are: funct-an
2
The categories of this paper are: math
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The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs