Self-similar Expansion of a Turbulent Bose-Einstein Condensate: A Generalized Hydrodynamic Model

被引：19

作者：

Caracanhas, M. ^{[1
]}

Fetter, A. L. ^{[2
]}

Baym, Gordon ^{[3
]}

Muniz, S. R. ^{[1
]}

Bagnato, V. S. ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil

[2] Stanford Univ, Dept Phys, GLAM, Stanford, CA 94305 USA

[3] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

来源：

JOURNAL OF LOW TEMPERATURE PHYSICS | 2013年 / 170卷 / 3-4期

基金：

巴西圣保罗研究基金会; 美国国家科学基金会;

关键词：

Atomic quantum fluid; Condensate expansion; Vortices; Turbulence; 3-DIMENSIONAL VORTEX DYNAMICS; SUPERFLUID HE-4;

D O I：

10.1007/s10909-012-0776-3

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We generalize the superfluid hydrodynamic equations to describe the expansion of a turbulent condensate cloud. Our Lagrangian formalism includes the kinetic energy associated with an entangled vortex configuration. The expressions developed here clarify the physics behind the self-similar free expansion as seen in experiments. This feature is a crucial and characteristic signature of turbulence. Our present study improves on our previous model (Caracanhas et al. in J. Low Temp. Phys. 166: 49, 2012).

引用

页码：133 / 142

页数：10

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