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Characterising arbitrary dark solitons in trapped one-dimensional Bose-Einstein condensates

Lookup NU author(s): Holly Middleton-Spencer, Professor Nick ParkerORCiD, Dr Luca Galantucci, Professor Carlo Barenghi

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This is the authors' accepted manuscript of an article that has been published in its final definitive form by Institute of Physics Publishing Ltd., 2021.

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Abstract

We present a method to detect the presence and depth of dark solitons within repulsive one-dimensional harmonically trapped Bose-Einstein condensates. For a system with one soliton, we provide numerical evidence that the shift of the density in Fourier space directly maps onto the depth of the soliton. For multi-soliton systems, combining our spectral method with established imaging techniques, the character of the solitons present in the condensate can be determined. We verify that the detection of solitons by the spectral shift works in the presence of waves induced by density engineering methods. Finally we discuss implications for vortex detection in three-dimensional Bose-Einstein condensates.

Publication metadata

Author(s): Middleton-Spencer HAJ, Parker NG, Galantucci L, Barenghi CF

Publication type: Article

Publication status: Published

Journal: Europhysics Letters

Year: 2021

Volume: 133

Issue: 1

Online publication date: 05/03/2021

Acceptance date: 08/02/2021

Date deposited: 07/04/2021

ISSN (electronic): 1286-4854

Publisher: Institute of Physics Publishing Ltd.

URL: https://doi.org/10.1209/0295-5075/133/16001

DOI: 10.1209/0295-5075/133/16001

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