Cooling Bose-Einstein condensates below 500 picokelvin

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

doi:10.1126/science.1088827

Author(s)

Leanhardt, A.

asquini, T.

Saba, M.

Schirotzek, A.

Shin, Y.

Kielpinski, D

Pritchard, D.

Ketterle, W.

Griffith University Author(s)

Kielpinski, David

Year published

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.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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Journal Title

Science

Volume

301

Publisher URI

http://sciencemag.org/

DOI

https://doi.org/10.1126/science.1088827

Copyright Statement

Publication URI

http://hdl.handle.net/10072/15492

Collection

Journal articles