論文

査読有り
2006年4月

Quantum-degenerate gases of Ytterbium atoms

Laser Physics
  • Y. Takasu
  • ,
  • T. Fukuhara
  • ,
  • M. Kitagawa
  • ,
  • M. Kumakura
  • ,
  • Y. Takahashi

16
4
開始ページ
713
終了ページ
717
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1134/S1054660X06040281
出版者・発行元
MAIK NAUKA/INTERPERIODICA/SPRINGER

Evaporative cooling of ultracold Yb atoms near the quantum-degenerate regime was experimentally studied. Three bosons of 170Yb, 172Yb, 176Yb and two fermions of 171Yb and 173Yb were evaporatively cooled in a crossed far-off resonant trap (FORT). We observed that 170Yb and 172Yb were not concentrated into the crossed region. We found that, in the cases of 176Yb atoms, atoms were concentrated well into the crossed region. The following evaporative cooling in the crossed region, however, did not work well. We performed the simultaneous trapping and sympathetic cooling in the crossed FORT by use of 172Yb-174Yb, 174Yb- 176Yb, 172Yb-176Yb, and 171Yb- 174Yb pairs. We observed that evaporative cooling worked well. This result shows that we succeeded in the enhancement of the atom collision rate. Especially, by use of 174Yb-176Yb mixture, we obtained cold 176Yb whose phase space density was 0.02. We observed a large atom loss, which limited the further sympathetic evaporative cooling. We also evaporatively cooled 174Yb in a 1D optical lattice. Evaporative cooling worked very well because the atoms were initially trapped at a high density. After evaporative cooling, we obtained very cold atoms, and T/T F was estimated to be 1.2. © Nauka/Interperiodica 2006.

リンク情報
DOI
https://doi.org/10.1134/S1054660X06040281
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000243786500028&DestApp=WOS_CPL
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=33750923058&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=33750923058&origin=inward
ID情報
  • DOI : 10.1134/S1054660X06040281
  • ISSN : 1054-660X
  • eISSN : 1555-6611
  • SCOPUS ID : 33750923058
  • Web of Science ID : WOS:000243786500028

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