期刊
PHYSICAL REVIEW A
卷 79, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.79.033619
关键词
Bose-Einstein condensation; superfluidity
资金
- JSPS Foundation [199748, 8740213, 18340109]
- MEXT [17071008]
- Grants-in-Aid for Scientific Research [17071008, 18340109] Funding Source: KAKEN
We propose a different type of Landau instability in trapped Bose-Einstein condensates by a helically moving environment. In the presence of quantized vortices, the instability can cause spontaneous radiation and amplification of Kelvin waves. This study gives a microscopic understanding of the Donnelly-Glaberson instability which was known as the hydrodynamic instability in superfluid helium. The Donnelly-Glaberson instability can be a powerful tool for observing the dispersion relation of Kelvin waves, vortex reconnections, and quantum turbulence in atomic Bose-Einstein condensates.
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