Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tsallis entropy is natural in the formulation of quantum noise   In this paper we introduce an easy to compute upper bound on the Tsallis
entropy of a density matrix describing a system coupled to a noise source. This
suggests that the Tsallis entropy is most natural in the context of quantum
information theory. Similarly we redefine entropy exchange and use the same
bound.

23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat