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