Fifty-fold improvement in the number of quantum degenerate fermionic atoms
Abstract
We have produced a quantum degenerate Li-6 Fermi gas with up to 7 x 107 atoms, an improvement by a factor of fifty over all previous experiments with degenerate Fermi gases. This was achieved by sympathetic cooling with bosonic Na-23 in the F=2, upper hyperfine ground state. We have also achieved Bose-Einstein condensation of F=2 sodium atoms by direct evaporation.
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