Fifty-fold improvement in the number of quantum degenerate fermionic atoms
Z. Hadzibabic, S. Gupta, C. A. Stan, C. H. Schunck, M. W. Zwierlein, K. Dieckmann, W. Ketterle
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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