Evidence for an Excited-State Efimov Trimer in a Three-Component Fermi Gas

被引：159

作者：

Williams, J. R. ^{[1
]}

Hazlett, E. L. ^{[1
]}

Huckans, J. H. ^{[1
]}

Stites, R. W. ^{[1
]}

Zhang, Y. ^{[1
]}

O'Hara, K. M. ^{[1
]}

机构：

[1] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.103.130404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We observe enhanced three-body recombination in a three-component Li-6 Fermi gas attributable to an excited Efimov trimer state intersecting the three-atom scattering threshold near 895 G. From measurements of the recombination rate we determine the Efimov parameters kappa(*) and eta(*) for the universal region above 600 G which includes three overlapping Feshbach resonances. The value of kappa(*) also predicts the locations of loss features previously observed near 130 and 500 G [T.B. Ottenstein et al., Phys. Rev. Lett. 101, 203202 (2008); J.H. Huckans et al., Phys. Rev. Lett. 102, 165302 (2009)] suggesting they are associated with a ground-state Efimov trimer near threshold. We also report on the realization of a degenerate three-component Fermi gas with approximate SU(3) symmetry.

引用

页数：4

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