Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Influence of Fock exchange in combined many-body perturbation and
  dynamical mean field theory   In electronic systems with long-range Coulomb interaction, the nonlocal Fock
exchange term has a band-widening effect. While this effect is included in
combined many-body perturbation theory and dynamical mean field theory schemes,
it is not taken into account in standard extended DMFT (EDMFT) calculations.
Here, we include this instantaneous term in both approaches and investigate its
effect on the phase diagram and dynamically screened interaction. We show that
the largest deviations between previously presented EDMFT and $GW$+EDMFT
results originate from the nonlocal Fock term, and that the quantitative
differences are especially large in the strong-coupling limit. Furthermore, we
show that the charge-ordering phase diagram obtained in $GW$+EDMFT methods for
moderate interaction values is very similar to the one predicted by dual boson
methods that include the fermion-boson or four-point vertex.

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The categories of this paper are: acc-phys
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The categories of this paper are: stat
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The categories of this paper are: nlin
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The categories of this paper are: hep-th
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The categories of this paper are: cs
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The categories of this paper are: math-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: adap-org
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The categories of this paper are: plasm-ph
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The categories of this paper are: econ
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The categories of this paper are: hep-ph
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The categories of this paper are: q-fin
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The categories of this paper are: comp-gas
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-lat
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The categories of this paper are: quant-ph