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Georg Bruun

Anisotropic relaxation dynamics in a dipolar Fermi gas driven out of equilibrium

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

  • K. Aikawa, University of Innsbruck, Østrig
  • A. Frisch, University of Innsbruck, Østrig
  • M. Mark, University of Innsbruck, Østrig
  • S. Baier, University of Innsbruck, Østrig
  • R. Grimm, University of Innsbruck, Østrig
  • J. L. Bohn, University of Colorado, Boulder, CO, USA
  • D. S. Jin, University of Colorado, Boulder, CO, USA
  • Georg Bruun
  • F. Ferlaino, University of Innsbruck, Østrig
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.
OriginalsprogEngelsk
Artikelnummer263201
TidsskriftPhysical Review Letters
Vol/bind113
Antal sider5
ISSN0031-9007
DOI
StatusUdgivet - 23 dec. 2014

    Forskningsområder

  • cond-mat.quant-gas, physics.atom-ph

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