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Isospinning hopfions
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA.
2013 (English)In: Journal of Physics A: Mathematical and Theoretical, ISSN 1751-8113, E-ISSN 1751-8121, Vol. 46, no 22, 225402- p.Article in journal (Refereed) Published
Abstract [en]

The problem of constructing internally rotating solitons of fixed angular frequency omega in the Faddeev-Skyrme model is reformulated as a variational problem for an energy-like functional, called pseudoenergy, which depends parametrically on omega. This problem is solved numerically using a gradient descent method, without imposing any spatial symmetries on the solitons, and the dependence of the solitons' energy on omega, and on their conserved total isospin J, studied. It is found that, generically, the shape of a soliton is independent of omega, and that its size grows monotonically with omega. A simple elastic rod model of time-dependent hopfions is developed which, despite having only one free parameter, accounts well for most of the numerical results.

Place, publisher, year, edition, pages
2013. Vol. 46, no 22, 225402- p.
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URN: urn:nbn:se:kth:diva-124278DOI: 10.1088/1751-8113/46/22/225402ISI: 000319044900012Scopus ID: 2-s2.0-84878122791OAI: oai:DiVA.org:kth-124278DiVA: diva2:634137
Note

QC 20130628

Available from: 2013-06-28 Created: 2013-06-28 Last updated: 2017-12-06Bibliographically approved

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