Measurement of the Interaction Energy near a Feshbach Resonance in a [Formula presented] Fermi Gas

T. Bourdel; J. Cubizolles; L. Khaykovich; K. M.F. Magalhes; S. J.J.M.F. Kokkelmans; G. V. Shlyapnikov; C. Salomon

doi:10.1103/PhysRevLett.91.020402

Measurement of the Interaction Energy near a Feshbach Resonance in a [Formula presented] Fermi Gas

T. Bourdel, J. Cubizolles, L. Khaykovich, K. M.F. Magalhes, S. J.J.M.F. Kokkelmans, G. V. Shlyapnikov, C. Salomon

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Abstract

We investigate the strongly interacting regime in an optically trapped [Formula presented] Fermi mixture near a Feshbach resonance. The resonance is found at [Formula presented] 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.

Original language	English
Journal	Physical Review Letters
Volume	91
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevLett.91.020402
State	Published - 11 Jul 2003
Externally published	Yes

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AU - Kokkelmans, S. J.J.M.F.

AU - Shlyapnikov, G. V.

AU - Salomon, C.

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AB - We investigate the strongly interacting regime in an optically trapped [Formula presented] Fermi mixture near a Feshbach resonance. The resonance is found at [Formula presented] 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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Measurement of the Interaction Energy near a Feshbach Resonance in a [Formula presented] Fermi Gas

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