title: Soliton-sound interactions in quasi-one-dimensional Bose-Einstein condensates.
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.
authors.affiliation: Department of Physics, University of Durham, South Road, Durham DH1 3LE, United Kingdom.
authors.forename: N G
authors.initials: NG
authors.lastname: Parker
authors.forename: N P
authors.initials: NP
authors.lastname: Proukakis
authors.forename: M
authors.initials: M
authors.lastname: Leadbeater
authors.forename: C S
authors.initials: CS
authors.lastname: Adams