Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anisotropic relaxation dynamics in a dipolar Fermi gas driven out of
  equilibrium   We report on the observation of a large anisotropy in the rethermalization
dynamics of an ultracold dipolar Fermi gas driven out of equilibrium. Our
system consists of an ultracold sample of strongly magnetic $^{167}$Er
fermions, spin-polarized in the lowest Zeeman sublevel. In this system, elastic
collisions arise purely from universal dipolar scattering. Based on
cross-dimensional rethermalization experiments, we observe a strong anisotropy
of the scattering, which manifests itself in a large angular dependence of the
thermal relaxation dynamics. Our result is in very good agreement with recent
theoretical predictions. Furthermore, we measure the rethermalization rate as a
function of temperature for different angles and find that the suppression of
collisions by Pauli blocking is not influenced by the dipole orientation.

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The categories of this paper are: q-bio
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The categories of this paper are: eess
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The categories of this paper are: mtrl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: q-fin
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The categories of this paper are: econ
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The categories of this paper are: chem-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: math
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The categories of this paper are: funct-an
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The categories of this paper are: plasm-ph
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The categories of this paper are: cs
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The categories of this paper are: comp-gas
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The categories of this paper are: patt-sol
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The categories of this paper are: gr-qc