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Originally published in Science Express on 18 October 2001
Science 9 November 2001:
Vol. 294. no. 5545, pp. 1320 - 1322
DOI: 10.1126/science.1066687
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Reports

Bose-Einstein Condensation of Potassium Atoms by Sympathetic Cooling

G. Modugno, G. Ferrari, G. Roati, R. J. Brecha, A. Simoni, M. Inguscio

We report on the Bose-Einstein condensation of potassium atoms, whereby quantum degeneracy is achieved by sympathetic cooling with evaporatively cooled rubidium. Because of the rapid thermalization of the two different atoms, the efficiency of the cooling process is high. The ability to achieve condensation by sympathetic cooling with a different species may provide a route to the production of degenerate systems with a larger choice of components.

European Laboratory for Nonlinear Spectroscopy (LENS), Università di Firenze, and Istituto Nazionale per la Fisica della Materia (INFM), Largo Enrico Fermi 2, 50125 Firenze, Italy.

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