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

Abstract

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.

arXiv comment4 pages, 4 figures

References in corpus (16)

• Formation of a Matter-Wave Bright Soliton
• Observation of a Strongly-Interacting Degenerate Fermi Gas of Atoms
• A quasi-pure Bose-Einstein condensate immersed in a Fermi sea
• Atom--Molecule Coherence in a Bose-Einstein Condensate
• Resonance superfluidity in a quantum degenerate Fermi gas
• Tuning p-wave interactions in an ultracold Fermi gas of atoms
• Fermi systems with long scattering lengths
• Three-body problem in Fermi gases with short-range interparticle interaction
• Resonant control of elastic collisions in an optically trapped Fermi gas of atoms
• Expansion of an interacting Fermi gas
• Decay of an ultracold fermionic lithium gas near a Feshbach resonance
• Elastic and inelastic collisions of 6Li in magnetic and optical traps
• Mechanical Stability of a Strongly-Interacting Fermi Gas of Atoms
• Bose-Einstein condensation into non-equilibrium states studied by condensate focusing
• Measurement of the Zero Crossing in a Feshbach Resonance of Fermionic 6-Li
• Magnetic field control of elastic scattering in a cold gas of fermionic lithium atoms

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