Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Functional renormalisation group approach to far-from-equilibrium
  quantum field dynamics   Dynamic equations for quantum fields far from equilibrium are derived by use
of functional renormalisation group techniques. The obtained equations are
non-perturbative and lead substantially beyond mean-field and quantum Boltzmann
type approximations. The approach is based on a regularised version of the
generating functional for correlation functions where times greater than a
chosen cutoff time are suppressed. As a central result, a time evolution
equation for the non-equilibrium effective action is derived, and the
time-evolution of the Green functions is computed within a vertex expansion. It
is shown that this agrees with the dynamics derived from the 1/N-expansion of
the two-particle irreducible effective action.

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The categories of this paper are: comp-gas
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The categories of this paper are: dg-ga
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The categories of this paper are: supr-con
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-bio
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The categories of this paper are: econ
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The categories of this paper are: hep-ex
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The categories of this paper are: acc-phys
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The categories of this paper are: astro-ph
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The categories of this paper are: math-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: q-fin
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The categories of this paper are: gr-qc
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The categories of this paper are: ao-sci
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The categories of this paper are: chem-ph
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The categories of this paper are: atom-ph