Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Holographic spectral functions and diffusion constants for fundamental
  matter   The holographic dual of large-Nc super-Yang-Mills coupled to a small number
of flavours of fundamental matter, Nf << Nc, is described by Nf probe D7-branes
in the gravitational background of Nc black D3-branes. This system undergoes a
first order phase transition characterised by the `melting' of the mesons. We
study the high temperature phase in which the D7-branes extend through the
black hole horizon. In this phase, we compute the spectral function for vector,
scalar and pseudoscalar modes on the D7-brane probe. We also compute the
diffusion constant for the flavour currents.

24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc