title: Tkachenko waves in rapidly rotating Bose-Einstein condensates.
abstract: We present a mean-field theory numerical study of Tkachenko waves of a vortex lattice in trapped atomic Bose-Einstein condenstates. Our results show remarkable qualitative and quantitative agreement with recent experiments at the Joint Institute for Laboratory Astrophysics. We extend our calculations beyond the conditions of the experiment, probing deeper into the incompressible regime where we find excellent agreement with analytical results. In addition, bulk excitations observed in the experiment are discussed.
authors.affiliation: Department of Physics and Astronomy, and Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14627, USA.
authors.forename: L O
authors.initials: LO
authors.lastname: Baksmaty
authors.forename: S J
authors.initials: SJ
authors.lastname: Woo
authors.forename: S
authors.initials: S
authors.lastname: Choi
authors.forename: N P
authors.initials: NP
authors.lastname: Bigelow