Buffer-Gas Cooled Bose-Einstein Condensate
Author(s)
Ketterle, Wolfgang; Connolly, Colin B.; Doyle, John M.; Doret, S. Charles
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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 ([superscript 4]He[superscript *]) is buffer-gas cooled, magnetically trapped, and evaporatively cooled to quantum degeneracy. 10[superscript 11] atoms are initially trapped, leading to Bose-Einstein condensation at a critical temperature of 5 μK and threshold atom number of 1.1×10 [superscript 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.
Date issued
2009-09Department
Massachusetts Institute of Technology. Department of PhysicsJournal
Physical Review Letters
Publisher
American Physical Society
Citation
Doret, S. Charles et al. “Buffer-Gas Cooled Bose-Einstein Condensate.” Physical Review Letters 103.10 (2009): 103005. © 2009 The American Physical Society.
Version: Final published version
ISSN
0031-9007