Roton spectroscopy in a harmonically trapped dipolar Bose-Einstein condensate

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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Cited by in corpus (65)

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• Collective excitations of self-bound droplets of a dipolar quantum fluid
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• Depletion and fluctuations of a trapped dipolar Bose-Einstein condensate in the roton regime
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• A general theory of flattened dipolar condensates
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