# Buffer-Gas Cooled Bose-Einstein Condensate

 Title: Buffer-Gas Cooled Bose-Einstein Condensate Author: Doret, S. Charles; Connolly, Colin Bryant; Ketterle, Wolfgang; Doyle, John M. Note: Order does not necessarily reflect citation order of authors. Citation: Doret, S. Charles, Colin B. Connolly, Wolfgang Ketterle, and John M. Doyle. 2009. Buffer-gas cooled Bose-Einstein condensate. Physical Review Letters 103(10): 103005. Full Text & Related Files: PRL_103_103005_2009.pdf (378.6Kb; PDF) 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 $$5 \mu K$$ and threshold atom number of 1.1×10$$^6$$. 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. Published Version: 10.1103/PhysRevLett.103.103005 Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:5349607

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Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University