Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generalized Kraus operators for the one-qubit depolarizing quantum
  channel   Microscopic Hamiltonian models of the composite system "open system +
environment" typically do not provide the operator-sum Kraus form of the open
system's dynamical map. With the use of a recently de- veloped method [16], we
derive the Kraus operators starting from the mi- croscopic Hamiltonian model,
i.e. from the proper master equation, of the one-qubit depolarizing channel.
Those Kraus operators generalize the stan- dard counterparts, which are widely
used in the literature. Comparison of the standard and the here obtained Kraus
operators is performed via inves- tigating dynamical change of the Bloch sphere
volume, entropy production and the open system's state trace distance. We find
that the standard depo- larizing channel is more deteriorating than the
generalized one.

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The categories of this paper are: chem-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: math
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The categories of this paper are: q-alg
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The categories of this paper are: nucl-th
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The categories of this paper are: math-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: comp-gas
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The categories of this paper are: atom-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-th
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The categories of this paper are: cs
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The categories of this paper are: nlin
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The categories of this paper are: q-bio
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The categories of this paper are: physics