Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Density Functional Resonance Theory of Unbound Electronic Systems   Density Functional Resonance Theory (DFRT) is a complex-scaled version of
ground-state Density Functional Theory (DFT) that allows one to calculate the
resonance energies and lifetimes of metastable anions. In this formalism, the
exact energy and lifetime of the lowest-energy resonance of unbound systems is
encoded into a complex "density" that can be obtained via complex-coordinate
scaling. This complex density is used as the primary variable in a DFRT
calculation just as the ground-state density would be used as the primary
variable in DFT. As in DFT, there exists a mapping of the N-electron
interacting system to a Kohn-Sham system of N non-interacting particles in
DFRT. This mapping facilitates self consistent calculations with an initial
guess for the complex density, as illustrated with an exactly-solvable model
system. Whereas DFRT yields in principle the exact resonance energy and
lifetime of the interacting system, we find that neglecting the
complex-correlation contribution leads to errors of similar magnitude to those
of standard scattering close-coupling calculations under the bound-state
approximation.

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The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
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The categories of this paper are: stat
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
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The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
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The categories of this paper are: q-fin
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The categories of this paper are: hep-th
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The categories of this paper are: comp-gas
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph