Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Interpretations of ground-state symmetry breaking and strong correlation
  in wavefunction and density functional theories   Strong correlations within a symmetry-unbroken ground-state wavefunction can
show up in approximate density functional theory as symmetry-broken
spin-densities or total densities, which are sometimes observable. They can
arise from soft modes of fluctuations (sometimes collective excitations) such
as spin-density or charge-density waves at non-zero wavevector. In this sense,
an approximate density functional for exchange and correlation that breaks
symmetry can be more revealing (albeit less accurate) than an exact functional
that does not. The examples discussed here include the stretched H$_2$
molecule, antiferromagnetic solids, and the static charge-density wave/Wigner
crystal phase of a low-density jellium. It is shown that (and in what sense)
the static charge density wave is a soft plasmon.

21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
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The categories of this paper are: eess
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
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The categories of this paper are: funct-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: mtrl-th
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom