Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: One-step approach to ARPES from strongly correlated solids: a
  Mott-Hubbard system   An expression is derived for angle-resolved photocurrent from a semi-infinite
correlated system. Within the sudden approximation, the photocurrent is
proportional to the spectral function of a one-particle two-time retarded
Green's function $\mathcal{G}$ of an operator that creates an electron in a
special quantum state $\chi$ localized at the surface. For a system described
by a many-body single-band model we present an analytical expression that
relates the Green's function $\mathcal{G}$ with the Green's function of an
infinite crystal $G_{b,\mathbf{k}}(\omega)$ in Wannier representation. The role
of final states and of the crystal surface is analysed for a model Green's
function of the infinite crystal with a three-peak spectral function typical of
a Mott-Hubbard metal. The momentum dependence of both the quasiparticle pole
position and the spectral weight of the incoherent band manifest themselves in
the shape of the photocurrent energy distribution curve.

23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas