Soliton-sound interactions in quasi-one-dimensional Bose-Einstein condensates
Abstract
The dynamics of dark solitons in quasi-one-dimensional Bose-Einstein condensates under longitudinal confinement are studied. A soliton oscillating in a tight `dimple' trap embedded in a weaker harmonic well is considered. By varying the dimple depth one can control the emission/reabsorption of sound by the soliton. In the limit of no reabsorption, the power radiated is proportional to the soliton acceleration squared, in agreement with analytical results from nonlinear optics. An experiment is proposed to detect sound emission as a change in amplitude and frequency of soliton oscillations.Keywords
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