Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamic spin-response function of the high-temperature
  Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$ superconductor form angle resolved
  photoemission spectra   We introduce a formalism for calculating dynamic response functions using
experimental single particle Green's functions derived from angle resolved
photoemission spectroscopy (ARPES). As an illustration of this procedure we
estimate the dynamic spin response of the cuprate superconductor
Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$. We find good agreement with superconducting
state neutron data, in particular the $(\pi,\pi)$ resonance with its unusual
`reversed magnon' dispersion. We anticipate our formalism will also be of
useful in interpreting results from other spectroscopies, such as optical and
Raman responses.

2
The categories of this paper are: math
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics