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arXiv · 0802.4097

Manifestations of the Roton Mode in Dipolar Bose-Einstein Condensates

Ryan M. Wilson·Shai Ronen·Han Pu·John L. Bohn
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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 "roton-like" 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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Ryan M. Wilson, Shai Ronen, Han Pu, John L. Bohn. 2010-02-08. Manifestations of the Roton Mode in Dipolar Bose-Einstein Condensates. https://doi.org/10.1103/physrevlett.100.245302

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