Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New perspectives in the ultrafast spectroscopy of many-body excitations
  in correlated materials   Ultrafast spectroscopies constitute a fundamental tool to investigate the
dynamics of non-equilibrium many-body states in correlated materials.
Two-pulses (pump-probe) experiments have shed new light on the interplay
between high-energy electronic excitations and the emerging low-energy
properties, such as superconductivity and charge-order, in many interesting
materials. Here we will review some recent results on copper oxides and we will
propose the use of high-resolution multi-dimensional techniques to investigate
the decoherence processes of optical excitations in these systems. This novel
piece of information is expected to open a new route toward the understanding
of the fundamental interactions that lead to the exotic electronic and magnetic
properties of correlated materials.

33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ