Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonequilibrium dynamics of urn models   Dynamical urn models, such as the Ehrenfest model, have played an important
role in the early days of statistical mechanics. Dynamical many-urn models
generalize the former models in two respects: the number of urns is
macroscopic, and thermal effects are included. These many-urn models are
exactly solvable in the mean-field geometry. They allow analytical
investigations of the characteristic features of nonequilibrium dynamics
referred to as aging, including the scaling of correlation and response
functions in the two-time plane and the violation of the
fluctuation-dissipation theorem. This review paper contains a general
presentation of these models, as well as a more detailed description of two
dynamical urn models, the backgammon model and the zeta urn model.

13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin