Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2005-10-05
Physical Review A 72, 053623 (2005)
Physics
Condensed Matter
Other Condensed Matter
to apper in Phys. Rev. A
Scientific paper
10.1103/PhysRevA.72.053623
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.
Kanti Ghosh Tarun
Machida Kazushige
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