Stable, Strongly Attractive, Two-State Mixture of Lithium Fermions in an Optical Trap

Details Stable, Strongly Attractive, Two-State Mixture of Lithium Fermions in an Optical Trap Stable, Strongly Attractive, Two-State Mixture of Lithium Fermions in an Optical Trap

2000-09-06

arxiv.org/abs/physics/0009026v1

Phys. Rev. Lett. 85, 2092 (2000)

Physics

Atomic Physics

4 pages using REVTeX, 3 eps figures

Scientific paper

10.1103/PhysRevLett.85.2092

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 elastic scattering cross section (4 PI a^2) to show that the magnitude of the scattering length |a| is very large, in agreement with predictions. We show that the mixture is stable against inelastic decay provided that a small bias magnetic field is applied. For this system, the s-wave interaction is widely tunable at low magnetic field, and can be turned on and off rapidly via a Raman PI pulse. Hence, this mixture is well suited for fundamental studies of an interacting Fermi gas.

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