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Phys Rev Lett. 2004 Apr 30;92(17):170402. Epub 2004 Apr 30.

Excitation spectroscopy of vortex lattices in a rotating Bose-Einstein condensate.

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Department of Physics and Astronomy, and Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14627, USA.


Excitation spectroscopy of vortex lattices in rotating Bose-Einstein condensates is described. We numerically obtain the Bogoliubov-de Gennes quasiparticle excitations for a broad range of energies and analyze them in the context of the complex dynamics of the system. Our work is carried out in a regime in which standard hydrodynamic assumptions do not hold, and includes features not readily contained within existing treatments.

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