2007年8月
Quantum degenerate fermi gases of ytterbium atoms
Journal of Low Temperature Physics
- ,
- ,
- ,
- 巻
- 148
- 号
- 3-4
- 開始ページ
- 441
- 終了ページ
- 445
- 記述言語
- 英語
- 掲載種別
- 研究論文(国際会議プロシーディングス)
- DOI
- 10.1007/s10909-007-9411-0
- 出版者・発行元
- SPRINGER/PLENUM PUBLISHERS
We performed evaporative cooling for dilute gases of ytterbium (Yb) isotopes in a crossed optical dipole trap and successfully cooled two fermionic and two bosonic species down to quantum degenerate regime, following the previous realization of Bose-Einstein condensation (BEC) in 174Yb. The elastic collision rate of fermionic 173Yb atoms with 6 spin components was found to be large enough to carry out efficient evaporation, which enables us to cool the atoms down to 0.6 T F, where T F is the Fermi temperature. In this regime, a plunge of evaporation efficiency was observed as an effect of the Fermi degeneracy. The other fermionic isotope 171Yb was cooled down to the temperature below T F by sympathetic cooling with bosonic 174Yb atoms. The sympathetic cooling technique has also been applied to 174Yb- 176Yb Bose-Bose mixture. We have observed almost pure BEC of 174Yb and the bimodal distribution of 176Yb, showing the formation of BEC-BEC mixture. Moreover, we performed evaporative cooling of 170Yb atoms and realized the BEC. © Springer Science+Business Media, LLC 2007.
- リンク情報
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- DOI
- https://doi.org/10.1007/s10909-007-9411-0
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000247737800057&DestApp=WOS_CPL
- Scopus
- https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=34447107997&origin=inward
- Scopus Citedby
- https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=34447107997&origin=inward
- ID情報
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- DOI : 10.1007/s10909-007-9411-0
- ISSN : 0022-2291
- eISSN : 1573-7357
- SCOPUS ID : 34447107997
- Web of Science ID : WOS:000247737800057