Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generalized model-independent approach to intrinsic decoherence   A formalism is presented to express decoherence both in the markovian and
nonmarkovian regimes and both dissipative and nondissipative in isolated
systems. The main physical hypothesis, already contained in the literature,
amounts to allowing some internal parameters of the system to evolve in a
random fashion. This formalism may also be applicable to open quantum systems.

28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th