Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Asymptotic Dynamics in Quantum Field Theory - When does the coupling
  switch off?   We discuss the approach to asymptotic dynamics due to Kulish and Faddeev. We
show that there are problems in applying this method to theories with four
point interactions. The source of the difficulties is identified and a more
general method is constructed. This is then applied to various theories
including some where the coupling does switch off at large times and some where
it does not.

22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex