A Bose-Einstein condensate immersed in a Fermi sea: observation of ultra-cold mixture of Bose and Fermi gases

Year: 2003

Authors: Khaykovich L., Schreck F., Cubizolles J., Bourdel T., Corwin K.L., Ferrari G., Salomon C.

Autors Affiliation: Laboratoire Kastler Brossel, Ecole Normale Superieure, 24 rue Lhomond, 75231 Paris Cedex 05, France

Abstract: 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 (Li-7), while its fermionic counterpart (Li-6) is cooled sympathetically until simultaneous quantum degeneracy is reached. The Li-7 Bose Einstein condensate contains a very small fraction of thermal atoms and is in thermal equilibrium with Li-6 Fermi sea at a temperature of (1)/(5) of the Fermi temperature. (C) 2003 Elsevier Science B.V. All rights reserved.

Journal/Review: PHYSICA B-CONDENSED MATTER

Volume: 329      Pages from: 13  to: 16

KeyWords: BEC-Fermi systems; sympathetic cooling; lithium
DOI: 10.1016/S0921-4526(02)01873-2

Citations: 5
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