Motion of a Solitonic Vortex in the BEC-BCS Crossover

被引：122
|
作者：
Ku, Mark J. H. [1 ]
Ji, Wenjie
Mukherjee, Biswaroop
Guardado-Sanchez, Elmer
Cheuk, Lawrence W.
Yefsah, Tarik
Zwierlein, Martin W.
机构：
[1] MIT, Elect Res Lab, Harvard Ctr Ultracold Atoms, Cambridge, MA 02139 USA
来源：
PHYSICAL REVIEW LETTERS | 2014年 / 113卷 / 06期
基金：
美国国家科学基金会;
关键词：
BOSE-EINSTEIN CONDENSATE; DARK SOLITONS; FERMI GAS; SUPERCONDUCTORS; TEMPERATURE; VORTICES; STATES; WAVES; PHASE; TRAP;
D O I：
10.1103/PhysRevLett.113.065301
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We observe a long-lived solitary wave in a superfluid Fermi gas of Li-6 atoms after phase imprinting. Tomographic imaging reveals the excitation to be a solitonic vortex, oriented transverse to the long axis of the cigar-shaped atom cloud. The precessional motion of the vortex is directly observed, and its period is measured as a function of the chemical potential in the BEC-BCS crossover. The long period and the correspondingly large ratio of the inertial to the bare mass of the vortex are in good agreement with estimates based on superfluid hydrodynamics that we derive here using the known equation of state in the BEC-BCS crossover.
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页数：5
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