Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Photoinduced in-gap excitations in the one-dimensional extended Hubbard
  model   We investigate the time evolution of optical conductivity in the half-filled
one-dimensional extended Hubbard model driven by a transient laser pulse, by
using the time-dependent Lanczos method. Photoinduced in-gap excitations
exhibit a qualitatively different structure in the spin-density wave (SDW) in
comparison to the charge-density-wave (CDW) phase. In the SDW, the origin of a
low-energy in-gap excitation is attributed to the even-odd parity of the
photoexcited states, while in the CDW an in-gap state is due to confined
photogenerated carriers. The signature of the in-gap excitations can be
identified as a characteristic oscillation in the time evolution of physical
quantities.

17
The categories of this paper are: q-fin
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an