Kelvin waves of quantized vortex lines in trapped bose-einstein condensates

Tapio Simula, T Mizushima, K Machida

Research output: Contribution to journalLetterResearchpeer-review

48 Citations (Scopus)

Abstract

We have theoretically investigated Kelvin waves of quantized vortex lines in trapped Bose-Einstein condensates. Counterrotating perturbation induces an elliptical instability to the initially straight vortex line, driven by a parametric resonance between a quadrupole mode and a pair of Kelvin modes of opposite momenta. Subsequently, Kelvin waves rapidly decay to longer wavelengths emitting sound waves in the process. We present a modified Kelvin wave dispersion relation for trapped superfluids and propose a simple method to excite Kelvin waves of specific wave number.
Original languageEnglish
Pages (from-to)1 - 4
Number of pages4
JournalPhysical Review Letters
Volume101
Issue number2
DOIs
Publication statusPublished - 2008
Externally publishedYes

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