Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optimized effective potential method and application to static RPA
  correlation   The optimized effective potential (OEP) method is a promising technique for
calculating the ground state properties of a system within the density
functional theory. However, it is not widely used as its computational cost is
rather high and, also, some ambiguity remains in the theoretical framework. In
order to overcome these problems, we first introduced a method that accelerates
the OEP scheme in a static RPA-level correlation functional. Second, the
Krieger-Li-Iafrate (KLI) approximation is exploited to solve the OEP equation.
Although seemingly too crude, this approximation did not reduce the accuracy of
the description of the magnetic transition metals (Fe, Co, and Ni) examined
here, the magnetic properties of which are rather sensitive to correlation
effects. Finally, we reformulated the OEP method to render it applicable to the
direct RPA correlation functional and other, more precise, functionals.
Emphasis is placed on the following three points of the discussion: i)
Level-crossing at the Fermi surface is taken into account; ii) eigenvalue
variations in a Kohn-Sham functional are correctly treated; and iii) the
resultant OEP equation is different from those reported to date.

25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga