Evidence for superfluidity in a resonantly interacting Fermi gas

被引：681

作者：

Kinast, J ^{[1
]}

Hemmer, SL ^{[1
]}

Gehm, ME ^{[1
]}

Turlapov, A ^{[1
]}

Thomas, JE ^{[1
]}

机构：

[1] Duke Univ, Dept Phys, Durham, NC 27708 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 15期

基金：

美国国家航空航天局; 美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.92.150402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We observe collective oscillations of a trapped, degenerate Fermi gas of Li-6 atoms at a magnetic field just above a Feshbach resonance, where the two-body physics does not support a bound state. The gas exhibits a radial breathing mode at a frequency of 2837(05) Hz, in excellent agreement with the frequency of nu(H)equivalent toroot10nu(x)nu(y)/3=2830(20) Hz predicted for a hydrodynamic Fermi gas with unitarity-limited interactions. The measured damping times and frequencies are inconsistent with predictions for both the collisionless mean field regime and for collisional hydrodynamics. These observations provide the first evidence for superfluid hydrodynamics in a resonantly interacting Fermi gas.

引用

页码：150402 / 1

页数：4

共 34 条

[1]

[Anonymous], COMMUNICATION

[2]

BARTENSTEIN M, CONDMAT0403716

[3]

BOURDEL T, CONDMAT0403091

[4]

BRUUN GM, CONDMAT0401497