Zero-energy states in rotating trapped Bose-Einstein condensates

被引：3
|
作者：
Simula, Tapio [1 ]
机构：
[1] Monash Univ, Sch Phys, Clayton, Vic 3800, Australia
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2013年 / 25卷 / 28期
关键词：
GAUGE-INVARIANCE; VORTEX OSCILLATIONS; VORTICES; STABILITY; HYDRODYNAMICS; SYMMETRIES; PARTICLES; BREAKING; FERMIONS; MODES;
D O I：
10.1088/0953-8984/25/28/285602
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We have calculated low-lying quasiparticle excitation spectra of rotating three-dimensional Bose-Einstein condensates. We find, as opposed to the prediction of hydrodynamic continuum theories, a minimum in the Tkachenko mode spectrum at intermediate rotation frequencies of the harmonic trap. Such a minimum can harbour a Tkachenko quasiparticle with zero excitation energy. We discuss the experimental signatures of such a zero mode.
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页数：8
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