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Low lying twisting and acoustic modes of a rotating Bose-Einstein condensate

Frédéric Chevy
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Abstract

We present a calculation of the low lying spectrum of a rotating Bose-Einstein condensate. We show that in a cylindrical geometry, there exist two linear branches, one associated to usual acoustic excitation, the other corresponding to a twisting mode of the vortex lattice. Using a hydrodynamical approach we derive the elasticity coefficient of the vortex lattice and calculate the spectrum of condensate in a three dimensionnal harmonic trap with cylindrical symmetry.

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Frédéric Chevy. 2006-02-10. Low lying twisting and acoustic modes of a rotating Bose-Einstein condensate. https://doi.org/10.1103/physreva.73.041604

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