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  • Title: Tkachenko modes of vortex lattices in rapidly rotating bose-einstein condensates.
    Author: Baym G.
    Journal: Phys Rev Lett; 2003 Sep 12; 91(11):110402. PubMed ID: 14525406.
    Abstract:
    We calculate the in-plane modes of the vortex lattice in a rotating Bose condensate, from the slowly rotating to mean-field quantum Hall limits. The Tkachenko mode frequency, linear in wave vector k for lattice rotational velocities Omega much smaller than the lowest sound wave frequency in a finite system, becomes quadratic in k in the opposite limit. The system also supports an inertial mode of frequency >or=2omega. The calculated frequencies are in excellent agreement with recent observations of Tkachenko modes by Phys. Rev. Lett., 91, 100402 (2003)].
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