Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Brownian yet non-Gaussian diffusion in heterogeneous media: from
  superstatistics to homogenization   We discuss the situations under which Brownian yet non-Gaussian (BnG)
diffusion can be observed in the model of a particle's motion in a random
landscape of diffusion coefficients slowly varying in space. Our conclusion is
that such behavior is extremely unlikely in the situations when the particles,
introduced into the system at random at $t=0$, are observed from the
preparation of the system on. However, it indeed may arise in the case when the
diffusion (as described in Ito interpretation) is observed under equilibrated
conditions. This paradigmatic situation can be translated into the model of the
diffusion coefficient fluctuating in time along a trajectory, i.e. into a kind
of the "diffusing diffusivity" model.

29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex