Mechanical stability of a strongly interacting Fermi gas of atoms

M. E. Gehm, S. L. Hemmer, S. R. Granade, K. M. O’Hara, J. E. Thomas

Research output: Contribution to journalArticle

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Abstract

A strongly attractive, two-component Fermi gas of atoms exhibits universal behavior and should be mechanically stable as a consequence of the quantum-mechanical requirement of unitarity. This requirement limits the maximum attractive force to a value smaller than that of the outward Fermi pressure. To experimentally demonstrate this stability, we use all-optical methods to produce a highly degenerate, two-component gas of [Formula Presented] atoms in an applied magnetic field near a Feshbach resonance, where strong interactions are observed. We find that gas is stable at densities far exceeding that predicted previously for the onset of mechanical instability. Further, we provide a temperature-corrected measurement of an important, universal, many-body parameter, which determines the stability—the mean-field contribution to the chemical potential in units of the local Fermi energy.

Original languageEnglish (US)
Number of pages1
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume68
Issue number1
DOIs
StatePublished - Jan 1 2003

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gases
atoms
requirements
temperature measurement
optics
magnetic fields
energy

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

Gehm, M. E. ; Hemmer, S. L. ; Granade, S. R. ; O’Hara, K. M. ; Thomas, J. E. / Mechanical stability of a strongly interacting Fermi gas of atoms. In: Physical Review A - Atomic, Molecular, and Optical Physics. 2003 ; Vol. 68, No. 1.
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Mechanical stability of a strongly interacting Fermi gas of atoms. / Gehm, M. E.; Hemmer, S. L.; Granade, S. R.; O’Hara, K. M.; Thomas, J. E.

In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 68, No. 1, 01.01.2003.

Research output: Contribution to journalArticle

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