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Vortex stretching as a mechanism for quantum kinetic energy decay
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Kerr, Robert M. (Robert McDougall) (2011) Vortex stretching as a mechanism for quantum kinetic energy decay. Physical Review Letters, Vol.106 (No.22). Article: 224501. doi:10.1103/PhysRevLett.106.224501
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Official URL: http://dx.doi.org/10.1103/PhysRevLett.106.224501
Abstract
A pair of perturbed anti-parallel quantum vortices, simulated using the three-dimensional Gross-Pitaevskii equations, is shown to be unstable to vortex stretching. This results in kinetic energy K∇ψ being converted into interaction energy EI and eventually local kinetic energy depletion that is similar to energy decay in a classical uid, even though the governing equations are Hamiltonian and energy conserving. The intermediate stages include: the generation of vortex waves, their deepening, multiple reconnections, the emission of vortex rings and phonons and the creation of an approximately -5/3 kinetic energy spectrum at high wavenumbers. All the wave generation and reconnection steps follow from interactions between the two original vortices, unlike the self- interactions in vortex wave models. A four vortex example is given to demonstrate that some of these steps might be general.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||
| Divisions: | Faculty of Science > Engineering Faculty of Science > Mathematics |
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| Library of Congress Subject Headings (LCSH): | Quantum theory, Topological defects (Physics), Superfluidity | ||||
| Journal or Publication Title: | Physical Review Letters | ||||
| Publisher: | American Physical Society | ||||
| ISSN: | 0031-9007 | ||||
| Official Date: | 1 June 2011 | ||||
| Dates: |
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| Volume: | Vol.106 | ||||
| Number: | No.22 | ||||
| Number of Pages: | 4 | ||||
| Page Range: | Article: 224501 | ||||
| DOI: | 10.1103/PhysRevLett.106.224501 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | Leverhulme Trust (LT), European Union (EU) | ||||
| Grant number: | F/00215/AC (LT) |
Data sourced from Thomson Reuters' Web of Knowledge
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