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Superdiffusion of quantized vortices uncovering scaling laws in quantum turbulence

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America
 [1];  [1];  [1]
  1. The Cryogenics Laboratory, National High Magnetic Field Laboratory, Tallahassee, FL 32310,, Mechanical Engineering Department, Florida State University, Tallahassee, FL 32310

Significance

Quantum turbulence (QT) can appear in the presence of a chaotic tangle of quantized vortices in various quantum-fluid systems, including atomic Bose–Einstein condensates, superfluid helium, superfluid neutron stars, etc. Insights into the generic scaling behaviors of tangled vortices are crucial in developing an advanced statistical model of QT. By tracking tracer particles trapped on vortices in superfluid 4 He, we report the observation of an apparent superdiffusion of the vortices in QT. Our analysis shows that this superdiffusion is not due to Lévy flights, i.e., long-distance hops that are responsible for superdiffusion of random walkers. Instead, a power-law scaling of the vortex–velocity correlation is identified as the cause. This finding may motivate extensive future research on hidden scaling laws in QT.

Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0020113
OSTI ID:
1848024
Alternate ID(s):
OSTI ID: 1774791
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 6 Vol. 118; ISSN 0027-8424
Publisher:
Proceedings of the National Academy of SciencesCopyright Statement
Country of Publication:
United States
Language:
English

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