Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A diffusion limit for a test particle in a random distribution of
  scatterers   We consider a point particle moving in a random distribution of obstacles
described by a potential barrier. We show that, in a weak-coupling regime,
under a diffusion limit suggested by the potential itself, the probability
distribution of the particle converges to the solution of the heat equation.
The diffusion coefficient is given by the Green-Kubo formula associated to the
generator of the diffusion process dictated by the linear Landau equation.

21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex