Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Reduction of periodic one-dimensional hopping model   In this research, methods of reducing a general periodic one-dimensional
hopping model to a one- or two-state model, which keeps the basic properties of
the original process, are discussed. This reduction also implies that, to some
extent, many processes can be well described by simple two-state or even
one-state models.

7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn