Cooling Bose-Einstein condensates below 500 picokelvin

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Leanhardt, A.
asquini, T.
Saba, M.
Schirotzek, A.
Shin, Y.
Kielpinski, D
Pritchard, D.
Ketterle, W.
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2003
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Abstract

Spin-polarized gaseous Bose-Einstein condensates were confined by a combination of gravitational and magnetic forces. The partially condensed atomic vapors were adiabatically decompressed by weakening the gravito-magnetic trap to a mean frequency of 1hertz, then evaporatively reduced in size to 2500 atoms. This lowered the peak condensate density to 5 x 1010 atoms per cubic centimeter and cooled the entire cloud in all three dimensions to a kinetic temperature of 450 ᠸ0 picokelvin. Such spin-polarized, dilute, and ultracold gases are important for spectroscopy, metrology, and atom optics.

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Science

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301

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© 2003 AAAS. Self-archiving of the author-manuscript version in an institutional repository is not yet supported by this publisher. Use hypertext link above to access the journal website.

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