Soliton-sound interactions in quasi-one-dimensional Bose-Einstein condensates |
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Authors: | Parker N G Proukakis N P Leadbeater M Adams C S |
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Institution: | Department of Physics, University of Durham, South Road, Durham DH1 3LE, United Kingdom. |
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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. |
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