Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum stochastic equation for the low density limit   A new derivation of quantum stochastic differential equation for the
evolution operator in the low density limit is presented. We use the
distribution approach and derive a new algebra for quadratic master fields in
the low density limit by using the energy representation. We formulate the
stochastic golden rule in the low density limit case for a system coupling with
Bose field via quadratic interaction. In particular the vacuum expectation
value of the evolution operator is computed and its exponential decay is shown.

26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph