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Universal Mechanism of Dissipation in Fermi Superfluids at Ultralow Temperatures
KTH, School of Engineering Sciences (SCI), Theoretical Physics, Statistical Physics.
2012 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 108, no 4, 045303- p.Article in journal (Refereed) Published
Abstract [en]

We show that the vortex dynamics in Fermi superfluids at ultralow temperatures is governed by the local heating of the vortex cores creating the heat flux carried by nonequilibrium quasiparticles emitted by moving vortices. This mechanism provides a universal zero temperature limit of dissipation in Fermi superfluids. For the typical experimental conditions realized by the turbulent motion of He-3-B, the temperature of the vortex cores is estimated to be of the order 0.2T(c). The dispersion of Kelvin waves is derived, and the heat flow generated by Kelvin cascade is shown to have a value close to that experimentally observed.

Place, publisher, year, edition, pages
2012. Vol. 108, no 4, 045303- p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-90646DOI: 10.1103/PhysRevLett.108.045303ISI: 000299826400010Scopus ID: 2-s2.0-84856161197OAI: oai:DiVA.org:kth-90646DiVA: diva2:510235
Note
QC 20120315Available from: 2012-03-15 Created: 2012-02-27 Last updated: 2017-12-07Bibliographically approved

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