Soliton-sound interactions in quasi-one-dimensional Bose-Einstein condensates
arXiv:cond-mat/0212278 · doi:10.1103/PhysRevLett.90.220401
Abstract
Longitudinal confinement of dark solitons in quasi-one-dimensional Bose-Einstein condensates leads to sound emission and reabsorption. We perform quantitative studies of the dynamics of a soliton oscillating in a tight dimple trap, embedded in a weaker harmonic trap. The dimple depth provides a sensitive handle to control the soliton-sound interaction. In the limit of no reabsorption, the power radiated is found to be proportional to the soliton acceleration squared. An experiment is proposed to detect sound emission as a change in amplitude and frequency of soliton oscillations.
4 pages, 5 figures. Revised manuscript, Phys. Rev. Lett. accepted
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