We report the formation of mixtures of bosonic and fermionic quantum systems in dilute atomic gases. Two isotopes of lithium are cooled by standard laser cooling techniques and transferred into a magnetic trap. Evaporative cooling is performed selectively on the bosonic isotope (7Li), while its fermionic counterpart (6Li) is cooled sympathetically until simultaneous quantum degeneracy is reached. The 7Li Bose-Einstein condensate contains a very small fraction of thermal atoms and is in thermal equilibrium with 6Li Fermi sea at a temperature of 15 of the Fermi temperature.
|Number of pages||4|
|Journal||Physica B: Condensed Matter|
|State||Published - May 2003|
|Event||Proceedings of the 23rd international conference on low temper - Hiroshima, Japan|
Duration: 20 Aug 2002 → 27 Aug 2002
Bibliographical noteFunding Information:
We are grateful to Y. Castin, J. Dalibard, C. Cohen-Tannoudji and G. Shlyapnikov for useful discussions. F.S. and K.L.C. was supported by the DAAD and by MENRT, G.F. by the EU network CT 2000-00165 CAUAC. This work was supported by CNRS, Collège de France and Region Ile de France. Laboratoire Kastler Brossel is Unité de recherche de l'Ecole Normale Supérieure et de l'Université Pierre et Marie Curie, associée au CNRS.
- Bose-Einstein condensation
- Fermi degenerate gas