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DOI | 10.1126/science.aat5793 |
Evolution of large-scale flow from turbulence in a two-dimensional superfluid | |
Johnstone, Shaun P.1; Groszek, Andrew J.1,5; Starkey, Philip T.1; Billington, Christopher J.1,2,3; Simula, Tapio P.1,6; Helmerson, Kristian1,4 | |
2019-06-28 | |
发表期刊 | SCIENCE
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ISSN | 0036-8075 |
EISSN | 1095-9203 |
出版年 | 2019 |
卷号 | 364期号:6447页码:1267-+ |
文章类型 | Article |
语种 | 英语 |
国家 | Australia; USA; England |
英文摘要 | Nonequilibrium interacting systems can evolve to exhibit large-scale structure and order. In two-dimensional turbulent flow, the seemingly random swirling motion of a fluid can evolve toward persistent large-scale vortices. To explain such behavior, Lars Onsager proposed a statistical hydrodynamic model based on quantized vortices. Here, we report on the experimental confirmation of Onsager's model. We dragged a grid barrier through an oblate superfluid Bose-Einstein condensate to generate nonequilibrium distributions of vortices. We observed signatures of an inverse energy cascade driven by the evaporative heating of vortices, leading to steady-state configurations characterized by negative absolute temperatures. Our results open a pathway for quantitative studies of emergent structures in interacting quantum systems driven far from equilibrium. |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000473271300044 |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/201759 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Monash Univ, Sch Phys & Astron, Clayton, Vic 3800, Australia; 2.NIST, Joint Quantum Inst, Gaithersburg, MD 20899 USA; 3.Univ Maryland, Gaithersburg, MD 20899 USA; 4.Monash Univ, ARC Ctr Excellence Future Low Energy Elect Techno, Clayton, Vic 3800, Australia; 5.Newcastle Univ, Joint Quantum Ctr JQC Durham Newcastle, Sch Math Stat & Phys, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England; 6.Swinburne Univ Technol, Ctr Quantum & Opt Sci, Melbourne, Vic 3122, Australia |
推荐引用方式 GB/T 7714 | Johnstone, Shaun P.,Groszek, Andrew J.,Starkey, Philip T.,et al. Evolution of large-scale flow from turbulence in a two-dimensional superfluid[J]. SCIENCE,2019,364(6447):1267-+. |
APA | Johnstone, Shaun P.,Groszek, Andrew J.,Starkey, Philip T.,Billington, Christopher J.,Simula, Tapio P.,&Helmerson, Kristian.(2019).Evolution of large-scale flow from turbulence in a two-dimensional superfluid.SCIENCE,364(6447),1267-+. |
MLA | Johnstone, Shaun P.,et al."Evolution of large-scale flow from turbulence in a two-dimensional superfluid".SCIENCE 364.6447(2019):1267-+. |
条目包含的文件 | 条目无相关文件。 |
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