Measurement of interaction energy near a Feshbach resonance in a 6Li Fermi gas

Details Measurement of interaction energy near a Feshbach resonance in a 6Li Fermi gas Measurement of interaction energy near a Feshbach resonance in a 6Li Fermi gas

2003-03-05

arxiv.org/abs/cond-mat/0303079v1

Physics

Condensed Matter

Statistical Mechanics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.91.020402

We investigate the strongly interacting regime in an optically trapped $^6$Li Fermi mixture near a Feshbach resonance. The resonance is found at $800(40) $G in good agreement with theory. Anisotropic expansion of the gas is interpreted by collisional hydrodynamics. We observe an unexpected and large shift ($80 $G) between the resonance peak and both the maximum of atom loss and the change of sign of the interaction energy.

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