Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Role of vertex corrections in the matrix formulation of the random phase
  approximation for the multiorbital Hubbard model   In the framework of a multiorbital Hubbard model description of
superconductivity, a matrix formulation of the superconducting pairing
interaction that has been widely used is designed to treat spin, charge and
orbital fluctuations within a random phase approximation (RPA). In terms of
Feynman diagrams, this takes into account particle-hole ladder and bubble
contributions as expected. It turns out, however, that this matrix formulation
also generates additional terms which have the diagrammatic structure of vertex
corrections. Here we examine these terms and discuss the relationship between
the matrix-RPA superconducting pairing interaction and the Feynman diagrams
that it sums.

24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs