Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exact correlation functions in particle-reaction models with immobile
  particles   Exact results on particle-densities as well as correlators in two models of
immobile particles, containing either a single species or else two distinct
species, are derived. The models evolve following a descent dynamics through
pair-annihilation where each particle interacts at most once throughout its
entire history. The resulting large number of stationary states leads to a
non-vanishing configurational entropy. Our results are established for
arbitrary initial conditions and are derived via a generating-function method.
The single-species model is the dual of the 1D zero-temperature kinetic Ising
model with Kimball-Deker-Haake dynamics. In this way, both infinite and
semi-infinite chains and also the Bethe lattice can be analysed. The
relationship with the random sequential adsorption of dimers and weakly tapped
granular materials is discussed.

9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
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
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph