Roton spectroscopy in a harmonically trapped dipolar Bose-Einstein condensate
arXiv:1206.2770 · doi:10.1103/PhysRevA.86.021604
Abstract
We study a harmonically trapped Bose-Einstein condensate with dipole-dipole interactions in a regime where a roton spectrum emerges. We show that the roton spectrum is clearly revealed in the static and dynamic structure factors which can be measured using Bragg spectroscopy. We develop and validate a theory based on the local density approximation for the dynamic structure factor.
5 pages, 4 figures
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