Condensation of pairs of fermionic atoms near a Feshbach resonance

被引：1047

作者：

Zwierlein, MW ^{[1
]}

Stan, CA

Schunck, CH

Raupach, SMF

Kerman, AJ

Ketterle, W

机构：

[1] MIT, Dept Phys, MIT Harvard Ctr Ultracold Atoms, Cambridge, MA 02139 USA

[2] MIT, Elect Res Lab, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 12期

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

D O I：

10.1103/PhysRevLett.92.120403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have observed Bose-Einstein condensation of pairs of fermionic atoms in an ultracold (6)Li gas at magnetic fields above a Feshbach resonance, where no stable (6)Li(2) molecules would exist in vacuum. We accurately determined the position of the resonance to be 822+/-3 G. Molecular Bose-Einstein condensates were detected after a fast magnetic field ramp, which transferred pairs of atoms at close distances into bound molecules. Condensate fractions as high as 80% were obtained. The large condensate fractions are interpreted in terms of preexisting molecules which are quasistable even above the two-body Feshbach resonance due to the presence of the degenerate Fermi gas.

引用

页码：120403 / 1

页数：4

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