Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spectral formulation and WKB approximation for rare-event statistics in
  reaction systems   We develop a spectral formulation and a stationary WKB approximation for
calculating the probabilities of rare events (large deviations from the mean)
in systems of reacting particles with infinite-range interaction, describable
by a master equation. We compare the stationary WKB approximation with a recent
time-dependent semiclassical approximation developed, for the same class of
problems, by Elgart and Kamenev. As a benchmark we use an exactly solvable
problem of the binary annihilation reaction 2A -> 0.

11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph