English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

A phenomenological model is developed to explain a new set of detailedtorsional oscillator data for hcp 4He. The model is based on Anderson's idea ofthe vortex fluid (vortex tangle) in solid 4He. Utilizing a well-studiedtreatment of dynamics of quantized vortices we describe how the "localsuperfluid component" is involved in rotation (torsional oscillation) via apolaried vortices tangle. The polarization in the tangle appears both due toaligning the remnant or thermal vortices and due to penetration of additionalvortices into volume. Both are supposed to occur in a relaxation manner, andthe inverse full relaxation time tau^-1 is the sum of them. One of them isfound to change linearly with respect to the rim velocity Vac. The developedapproach explains the behavior of both NLRS and Delta Q^-1 seen in theexperiment. We reproduce not only the unique Vac dependence, but also obtainnew information about the vortices tangle, for example, a divergence in tau atextrapolated T ~ 30 mK.

Vortex Fluid Relaxation Model for Torsional Oscillation Responses of Solid 4He