Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Time-resolved exciton wave functions from time-dependent
  density-functional theory   Time-dependent density-functional theory (TDDFT) is a computationally
efficient first-principles approach for calculating optical spectra in
insulators and semiconductors, including excitonic effects. We show how exciton
wave functions can be obtained from TDDFT via the Kohn-Sham transition density
matrix, both in the frequency-dependent linear-response regime and in real-time
propagation. The method is illustrated using one-dimensional model solids. In
particular, we show that our approach provides insight into the formation and
dissociation of excitons in real time. This opens the door to time-resolved
studies of exciton dynamics in materials by means of real-time TDDFT.

19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an