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arXiv · 0803.2574

Kelvin Waves of Quantized Vortex Lines in Trapped Bose-Einstein Condensates

T. P. Simula·T. Mizushima·K. Machida
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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.

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T. P. Simula, T. Mizushima, K. Machida. 2008-07-10. Kelvin Waves of Quantized Vortex Lines in Trapped Bose-Einstein Condensates. https://doi.org/10.1103/physrevlett.101.020402

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