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APS » Journals » Phys. Rev. Lett. » Volume 98 » Issue 3
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Phys. Rev. Lett. 98, 030401 (2007) [4 pages]

Degenerate Fermi Gases of Ytterbium

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Takeshi Fukuhara1, Yosuke Takasu2, Mitsutaka Kumakura1,3,4, and Yoshiro Takahashi1,3
1Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
2Department of Electronic Science and Engineering, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
3CREST, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan
4PRESTO, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan

Received 8 July 2006; published 17 January 2007

Evaporative cooling was performed to cool fermionic 173Yb atoms in a crossed optical dipole trap. The large elastic collision rate leads to efficient evaporation and we have successfully cooled the atoms to 0.37±0.06 of the Fermi temperature, that is to say, to a quantum degenerate regime. In this regime, a plunge of evaporation efficiency was observed as a result of Fermi degeneracy.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.98.030401
DOI:
10.1103/PhysRevLett.98.030401
PACS:
03.75.Ss, 32.80.Pj, 34.50.−s
 
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