Zero-energy states in rotating trapped Bose-Einstein condensates.
نویسنده
چکیده
We have calculated low-lying quasiparticle excitation spectra of rotating three-dimensional Bose-Einstein condensates. We find, as opposed to the prediction of hydrodynamic continuum theories, 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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عنوان ژورنال:
- Journal of physics. Condensed matter : an Institute of Physics journal
دوره 25 28 شماره
صفحات -
تاریخ انتشار 2013