Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamical Correction to the Bethe-Salpeter Equation Beyond the
  Plasmon-Pole Approximation   The Bethe-Salpeter equation (BSE) formalism is a computationally affordable
method for the calculation of accurate optical excitation energies in molecular
systems. Similar to the ubiquitous adiabatic approximation of time-dependent
density-functional theory, the static approximation, which substitutes a
dynamical (i.e., frequency-dependent) kernel by its static limit, is usually
enforced in most implementations of the BSE formalism. Here, going beyond the
static approximation, we compute the dynamical correction of the electron-hole
screening for molecular excitation energies thanks to a renormalized
first-order perturbative correction to the static BSE excitation energies. The
present dynamical correction goes beyond the plasmon-pole approximation as the
dynamical screening of the Coulomb interaction is computed exactly within the
random-phase approximation. Our calculations are benchmarked against high-level
(coupled-cluster) calculations, allowing to assess the clear improvement
brought by the dynamical correction for both singlet and triplet optical
transitions.

26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga