Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phenomenological Quantum Thermodynamics of Closed Bipartite Schottky
  Systems   How to introduce thermodynamics to quantum mechanics ? Among from numerous
possibilities of solving this task, the simple choice is here: The conventional
von Neumann equation deals with a density operator whose probability weights
are time independent. Because there is no reason apart from the reversible
quantum mechanics that these weights have to be time independent, this
constraint is waived, thus making possible to introduce thermodynamical
concepts to quantum mechanics. %\textcolor{green}{ This procedure is similar to
that of Lindblad's equation, but different on principle. %\textcolor{red}{ But
beyond this simple starting-point, the applied thermodynamical concepts of
discrete systems may perform a "source theory" for other versions of
phenomenological quantum thermodynamics.

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The categories of this paper are: hep-th
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The categories of this paper are: hep-ex
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The categories of this paper are: econ
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The categories of this paper are: hep-lat
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The categories of this paper are: q-bio
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The categories of this paper are: solv-int
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The categories of this paper are: stat
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: alg-geom
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The categories of this paper are: mtrl-th
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The categories of this paper are: acc-phys
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The categories of this paper are: chem-ph
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The categories of this paper are: eess
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The categories of this paper are: nucl-ex