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. 2009 Sep 4;103(10):103005.
doi: 10.1103/PhysRevLett.103.103005. Epub 2009 Sep 3.

Buffer-gas Cooled Bose-Einstein Condensate

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Buffer-gas Cooled Bose-Einstein Condensate

S Charles Doret et al. Phys Rev Lett. .

Abstract

We report the creation of a Bose-Einstein condensate using buffer-gas cooling, the first realization of Bose-Einstein condensation using a broadly general method which relies neither on laser cooling nor unique atom-surface properties. Metastable helium ((4)He*) is buffer-gas cooled, magnetically trapped, and evaporatively cooled to quantum degeneracy. 10(11) atoms are initially trapped, leading to Bose-Einstein condensation at a critical temperature of 5 microK and threshold atom number of 1.1 x 10(6). This method is applicable to a wide array of paramagnetic atoms and molecules, many of which are impractical to laser cool and impossible to surface cool.

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