Dynamics of a highly-degenerate, strongly-interacting Fermii gas of atoms

John E. Thomas, S. L. Hemmer, J. Kinast, A. Turlapov, M. E. Gehm, K. M. O'Hara

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We use all-optical methods to produce a highly-degenerate, Fermi gas of 6 Li atoms near a Feshbach resonance, where strong interactions are predicted. In this regime, the zero-energy scattering length is larger than the interparticle spacing, and both the mean field energy and the collision rate take on universal forms as a consequence of unitarity and many-body interactions. Our experiments study universal hydrodynamic expansion of the gas and universal mean field interactions. By measuring the cloud radii of the trapped gas, we determine a universal parameter for strongly interacting two-component Fermi systems, the ratio of the mean field energy to the kinetic energy.

Original languageEnglish (US)
Pages (from-to)655-664
Number of pages10
JournalJournal of Low Temperature Physics
Issue number1-2
StatePublished - Jan 2004

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • General Materials Science
  • Condensed Matter Physics


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