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Matter-wave dark solitons in boxlike traps

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.

Publication metadata

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


DOI: 10.1103/PhysRevA.95.013628

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Funder referenceFunder name
EP/M005127/1Commonwealth Scholarship Commission in the United Kingdom