Mechanical stability of a strongly interacting Fermi gas of atoms

M. E. Gehm, S. L. Hemmer, S. R. Granade, Kenneth O'Hara, J. E. Thomas

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Abstract

A study was performed to show heuristically that the maximum inward force arising from attractive interactions in a two-state gas of atomic fermions is limited by quantum mechanics to a value less than the outward Fermi pressure. This idea was experimentally demonstrated by directly cooling a two-component Fermi gas of 6Li atoms to high degeneracy in an optical trap at magnetic fields near a Feshbach resonance. Imaging the cloud both in the trap and after an abrupt release, no evidence of instability was found. By measuring the relevant universal many-body parameter β, stability was quantitatively described.

Original languageEnglish (US)
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume68
Issue number1
StatePublished - Jul 1 2003

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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    Gehm, M. E., Hemmer, S. L., Granade, S. R., O'Hara, K., & Thomas, J. E. (2003). Mechanical stability of a strongly interacting Fermi gas of atoms. Physical Review A - Atomic, Molecular, and Optical Physics, 68(1).