All-Optical Production of a Degenerate Fermi Gas

Abstract

We achieve degeneracy in a mixture of the two lowest hyperfine states of ${}^6$Li by direct evaporation in a CO${}_2$ laser trap, yielding the first all-optically produced degenerate Fermi gas. More than $10^5$ atoms are confined at temperatures below $4\mu$K at full trap depth, where the Fermi temperature for each state is $8\mu$K. This degenerate two-component mixture is ideal for exploring mechanisms of superconductivity ranging from Cooper pairing to Bose condensation of strongly bound pairs.

4 pgs RevTeX with 2 eps figs, to be published in Phys. Rev. Lett

References in corpus (4)

• A quasi-pure Bose-Einstein condensate immersed in a Fermi sea
• All Optical Formation of an Atomic Bose-Einstein Condensate
• Resonance superfluidity in a quantum degenerate Fermi gas
• Prospect of creating a composite fermi/bose superfluid

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