Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quasi-inversion of quantum and classical channels in finite dimensions   We introduce the concept of quasi-inverse of quantum and classical channels,
prove general properties of these inverses and determine them for a large class
of channels acting in an arbitrary finite dimension. Therefore we extend the
previous results of [1] to arbitrary dimensional channels and to the classical
domain. We demonstrate how application of the proposed scheme can increase on
the average the fidelity between a given random pure state and its image
transformed by the quantum channel followed by its quasi-inversion.

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The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex
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The categories of this paper are: econ
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
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The categories of this paper are: hep-th
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The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
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The categories of this paper are: nlin
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The categories of this paper are: hep-ph
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci