Pairing effects in ultra-cold fermionic lithium

Experiments on ultra-cold fermionic /sup 6/Li confined in a crossed dipole trap. /sup 6/Li possesses Feshbach resonances both in the s-wave and p-wave channels. This features enables the exploration of both s-wave and p-wave pairing mechanisms. We first discuss our observation of Bose-Einstein conde...

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Bibliographic Details
Main Authors: McKcever, J., Tarruell, L., Teichmarm, M., Chevy, F., Zhang, J., Khaykovich, L., van Kemperi, E.G.M., Kokkelmans, S.J.J.M.F., Salomon, C.
Format: Conference Proceeding
Language:English
Subjects:
Gallium nitride
Gases
Land surface temperature
Lithium
Magnetic fields
Magnetic resonance
Magnetic variables control
Particle scattering
Physics
Stationary state
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Summary:Experiments on ultra-cold fermionic /sup 6/Li confined in a crossed dipole trap. /sup 6/Li possesses Feshbach resonances both in the s-wave and p-wave channels. This features enables the exploration of both s-wave and p-wave pairing mechanisms. We first discuss our observation of Bose-Einstein condensation of /sup 6/Li/sub 2/ molecules in the low-magnetic field wing the s-wave Feshbach located at /spl sim/ 834 G. The molecular BEC offers a good starting point for the exploration of the BEC-BCS (Bardeen-Cooper-Schrieffer) crossover. We have also located p-wave Feshbach resonances in the two lowest hyperfine states of /sup 6/Li. The experimental positions of these resonances are in good agreement with those predicted by coupled channel calculations. We have studied the atom losses close to these resonances and have developed a semi-analytical model capturing our experimental findings.
DOI:10.1109/EQEC.2005.1567386