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Soliton-sound interactions in quasi-one-dimensional Bose-Einstein condensates

N. G. Parker·N. P. Proukakis·M. Leadbeater·C. S. Adams
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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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N. G. Parker, N. P. Proukakis, M. Leadbeater, C. S. Adams. 2003-05-05. Soliton-sound interactions in quasi-one-dimensional Bose-Einstein condensates. https://doi.org/10.1103/physrevlett.90.220401

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