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arXiv · 1207.5892

Zero-energy states in rotating trapped Bose-Einstein condensates

Tapio Simula
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Abstract

We have calculated low-lying quasiparticle excitation spectra of rotating three-dimensional Bose-Einstein condensates. As opposed to the prediction of hydrodynamic continuum theories, we find a minimum in the Tkachenko mode spectrum at intermediate rotation frequencies of the harmonic trap. Such a minimum can harbour a Tkachenko quasiparticle with zero excitation energy. We discuss the experimental signatures of such a zero mode.

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Tapio Simula. 2013-06-24. Zero-energy states in rotating trapped Bose-Einstein condensates. https://doi.org/10.1088/0953-8984%2F25%2F28%2F285602

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