Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Robinson-Trautman spacetimes and gauge/gravity duality   We study far-from-equilibrium field theory dynamics using gauge/gravity
duality applied to the Robinson-Trautman (RT) class of spacetimes and we
present a number of new results. First, we assess the applicability of the
hydrodynamic approximation to inhomogeneous plasma dynamics dual to RT
spacetimes. We prove that to any order in a late time expansion it is possible
to identify variables corresponding to the local energy density and fluid
velocity. However, we show using numerical examples that this does not hold at
the non-perturbative level; for sufficiently inhomogeneous initial data a local
rest frame does not exist. Second, we preset a new class of holographic
inhomogeneous plasma flows on the plane. The corresponding spacetimes are not
of the RT type but they can be obtained from RT spacetimes with spatially
compact boundaries by coordinate transformations which generate Poincar\'e
patch-like coordinates with planar boundaries. We demonstrate the application
of this procedure using numerical examples.

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The categories of this paper are: cond-mat
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The categories of this paper are: adap-org
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The categories of this paper are: bayes-an
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The categories of this paper are: q-fin
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The categories of this paper are: chao-dyn
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The categories of this paper are: physics
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The categories of this paper are: patt-sol
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The categories of this paper are: alg-geom
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The categories of this paper are: supr-con
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The categories of this paper are: astro-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: plasm-ph
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The categories of this paper are: atom-ph
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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: nucl-th