Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Classical simulations of communication channels   We investigate whether certain non-classical communication channels can be
simulated by a classical channel with a given number of states and a given
`amount' of noise. It is proved that any noisy quantum channel can be simulated
by a corresponding classical channel with `the same amount' of noise. Classical
simulations of general probabilistic channels are also studied.

25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex