Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hydrodynamic transport in the Luttinger-Abrikosov-Beneslavskii non-Fermi
  liquid   We determine the shear viscosity and the dc electrical conductivity of
interacting three-dimensional Luttinger semimetals, which have a quadratic band
touching point in the energy spectrum, in the hydrodynamic regime. It is
well-known that when the chemical potential is right at the band touching point
the long-range Coulomb interaction induces the Luttinger-Abrikosov-Beneslavskii
(LAB) phase at T = 0, which is an interacting, scale-invariant,
non-Fermi-liquid state of electrons. Upon combining the renormalization-group
(RG) analysis near the upper critical spatial dimension of four with the
Boltzmann kinetic equation, we determine the universal ratio of viscosity over
entropy, and the electrical dc conductivity of the system at the interacting
LAB fixed point of the RG flow. The projection of the Coulomb interaction on
the eigenstates of the system is found to play an important quantitative role
for the scattering amplitude in the collision integral, and the so-called
Auger-processes make a large numerical contribution to the inverse scattering
time in the transport quantities. The obtained leading order result suggests
that the universal ratio of the viscosity over entropy, when extrapolated to
the physical three spatial dimensions, is above, but could be rather close to,
the Kovtun-Son-Starinets lower bound.

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The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
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The categories of this paper are: solv-int
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The categories of this paper are: adap-org
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The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
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The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
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The categories of this paper are: mtrl-th
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The categories of this paper are: eess
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The categories of this paper are: chao-dyn
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The categories of this paper are: supr-con