Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Internal and External Fluctuation Activated Non-equilibrium Reactive
  Rate Process   The activated rate process for non-equilibrium open systems is studied taking
into account both internal and external noise fluctuations in a unified way.
The probability of a particle diffusing passing over the saddle point and the
rate constant together with the effective transmission coefficient are
calculated via the method of reactive flux. We find that the complexity of
internal noise is always harmful to the diffusion of particles. However the
external modulation may be beneficial to the rate process.

20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th