1206.2770 (P. B. Blakie et al.)

Roton spectroscopy in a harmonically trapped dipolar Bose-Einstein
condensate    [PDF]

P. B. Blakie, D. Baillie, R. N. Bisset

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.

View original: http://arxiv.org/abs/1206.2770