期刊
JOURNAL OF LOW TEMPERATURE PHYSICS
卷 170, 期 3-4, 页码 133-142出版社
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10909-012-0776-3
关键词
Atomic quantum fluid; Condensate expansion; Vortices; Turbulence
资金
- Fapesp (CEPID)
- CNPq-CAPES (INCT)
- NSF [PHY09-69790, PHY10-1066292]
- Division Of Physics
- Direct For Mathematical & Physical Scien [0969790] Funding Source: National Science Foundation
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).
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