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6 papers
Observation of a Strongly-Interacting Degenerate Fermi Gas of Atoms
K. M. O'Hara, S. L. Hemmer, M. E. Gehm +2
We report on the observation of a highly-degenerate, strongly-interacting Fermi gas of atoms. Fermionic Li atoms in an optical trap are evaporatively cooled to degeneracy using…
Mechanical Stability of a Strongly-Interacting Fermi Gas of Atoms
M. E. Gehm, S. L. Hemmer, S. R. Granade +2
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 unit…
Measurement of the Zero Crossing in a Feshbach Resonance of Fermionic 6-Li
K. M. O'Hara, S. L. Hemmer, S. R. Granade +5
We measure a zero crossing in the scattering length of a mixture of the two lowest hyperfine states of 6-Li. To locate the zero crossing, we monitor the decrease in temperature and…
All-Optical Production of a Degenerate Fermi Gas
S. R. Granade, M. E. Gehm, K. M. O'Hara +1
We achieve degeneracy in a mixture of the two lowest hyperfine states of Li by direct evaporation in a CO laser trap, yielding the first all-optically produced degenerate F…
Stable, Strongly Attractive, Two-State Mixture of Lithium Fermions in an Optical Trap
K. M. O'Hara, M. E. Gehm, S. R. Granade +2
We use an all-optical trap to confine a strongly attractive two-state mixture of lithium fermions. By measuring the rate of evaporation from the trap, we determine the effective el…
Ultrastable CO2 Laser Trapping of Lithium Fermions
K. M. O'Hara, S. R. Granade, M. E. Gehm +4
We demonstrate an ultrastable CO2 laser trap that provides tight confinement of neutral atoms with negligible optical scattering and minimal laser-noise- induced heating. Using thi…