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Updated: Jul 3, 2026

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
Published on: August 17, 2017
Manifestations of the roton mode in dipolar Bose-Einstein condensates
Ryan M Wilson1, Shai Ronen, John L Bohn
1JILA and Department of Physics, University of Colorado, Boulder, Colorado 80309-0440, USA.
Abstract:
We investigate the structure of trapped Bose-Einstein condensates (BECs) with long-range anisotropic dipolar interactions. We find that a small perturbation in the trapping potential can lead to dramatic changes in the condensate's density profile for sufficiently large dipolar interaction strengths and trap aspect ratios. By employing perturbation theory, we relate these oscillations to a previously identified "rotonlike" mode in dipolar BECs. The same physics is responsible for radial density oscillations in vortex states of dipolar BECs that have been predicted previously.
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