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Ghosh, Tarun Kanti Okayama University
Machida, K. Okayama University
We study properties of excited states of an array of weakly coupled quasi-two-dimensional Bose condensates by using the hydrodynamic theory. The spectrum of the axial excited states strongly depends on the coupling among the various discrete radial modes in a given symmetry. By including mode coupling within a given symmetry, the complete excitation spectrum of axial quasiparticles with various discrete radial nodes are presented. A single parameter which determines the strength of the mode coupling is identified. The excitation spectrum in the zero angular momentum sector can be observed by using the Bragg scattering experiments.
Digital Object Identifer:10.1103/PhysRevA.72.053623
Published with permission from the copyright holder. This is the institute's copy, as published in Physical Review A, November 2005, Volume 72, Issue 5, Pages 5.
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Physical Review A
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