Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Understanding reversible looping kinetics of a long polymer molecule in
  solution. Exact solution for two state model with delta function coupling   In this paper, the looping kinetics of a long polymer chain in solution has
been investigated by using two state model, where one state represents open
chain polymer molecule and the other represents closed chain polymer molecule.
The dynamics of end-to end distance of both open chain and closed chain polymer
is represented by a Smoluchowski-like equation for a single particle under two
different harmonic potentials. The coupling between these two potentials are
assumed to be a Dirac Delta function in our model. We evaluate two rate
constants, the long term and the average rate constant. We have also
incorporated the effect of all other chemical reactions involving at least one
end of the open chain polymer molecule - on rate of end-to-end loop formation.
The closed chain polymer molecule can be converted to a open chain molecule by
breaking of any bond - the effect of this reaction on the rate of end-to-end
loop formation is also considered in our model.

21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph