Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Time Reversal Invariance of quantum kinetic equations: Nonequilibrium
  Green Functions Formalism   Time reversal symmetry is a fundamental property of many quantum mechanical
systems. The relation between statistical physics and time reversal is subtle
and not all statistical theories conserve this particular symmetry, most
notably hydrodynamic equations and kinetic equations such as the Boltzmann
equation. In this article it is shown analytically that quantum kinetic
generalizations of the Boltzmann equation that are derived using the
nonequilibrium Green functions formalism as well as all approximations that
stem from $\Phi$-derivable selfenergies are time reversal invariant.

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The categories of this paper are: hep-lat
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The categories of this paper are: solv-int
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The categories of this paper are: q-alg
3
The categories of this paper are: physics
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The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
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The categories of this paper are: econ
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-ph
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The categories of this paper are: eess
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The categories of this paper are: nucl-ex
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The categories of this paper are: stat
35
The categories of this paper are: mtrl-th