Precision Measurements of Collective Oscillations in the BEC-BCS Crossover

Details Precision Measurements of Collective Oscillations in the BEC-BCS Crossover Precision Measurements of Collective Oscillations in the BEC-BCS Crossover

2006-09-15

arxiv.org/abs/cond-mat/0609390v2

Phys.Rev.Lett.98:040401,2007

Physics

Condensed Matter

Other Condensed Matter

improved discussion of small ellipticity and anharmonicity corrections

Scientific paper

10.1103/PhysRevLett.98.040401

We report on precision measurements of the frequency of the radial compression mode in a strongly interacting, optically trapped Fermi gas of Li-6 atoms. Our results allow for a test of theoretical predictions for the equation of state in the BEC-BCS crossover. We confirm recent quantum Monte-Carlo results and rule out simple mean-field BCS theory. Our results show the long-sought beyond-mean-field effects in the strongly interacting BEC regime.

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