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Lookup NU author(s): Professor Carlo Barenghi, Professor Nick ParkerORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
Motivated by the experimental development of quasihomogeneous Bose-Einstein condensates confined in boxlike traps, we study numerically the dynamics of dark solitons in such traps at zero temperature. We consider the cases where the side walls of the box potential rise either as a power law or a Gaussian. While the soliton propagates through the homogeneous interior of the box without dissipation, it typically dissipates energy during a reflection from a wall through the emission of sound waves, causing a slight increase in the soliton's speed. We characterize this energy loss as a function of the wall parameters. Moreover, over multiple oscillations and reflections in the boxlike trap, the energy loss and speed increase of the soliton can be significant, although the decay eventually becomes stabilized when the soliton equilibrates with the ambient sound field.
Author(s): Sciacca M, Barenghi CF, Parker NG
Publication type: Article
Publication status: Published
Journal: Physical Review A
Year: 2017
Volume: 95
Pages: 013628
Print publication date: 25/01/2017
Online publication date: 25/01/2017
Acceptance date: 25/01/2017
Date deposited: 26/01/2017
ISSN (print): 2469-9926
ISSN (electronic): 2469-9934
Publisher: American Physical Society
URL: https://doi.org/10.1103/PhysRevA.95.013628
DOI: 10.1103/PhysRevA.95.013628
Data Access Statement: http://dx.doi.org/10.17634/101785-4
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