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Controllable nonlocal interactions between dark solitons in dipolar condensates

Lookup NU author(s): Dr Tom Bland, Dr Matthew Edmonds, Professor Nikolaos ProukakisORCiD, Professor Nick ParkerORCiD

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Abstract

We study the family of static and moving dark solitons in quasi-one-dimensional dipolar Bose-Einstein condensates, exploring their modified form and interactions. The density dip of the soliton acts as a giant antidipole which adds a nonlocal contribution to the conventional local soliton-soliton interaction. We map out the stability diagram as a function of the strength and polarization direction of the atomic dipoles, identifying both roton and phonon instabilities. Away from these instabilities, the solitons collide elastically. Varying the polarization direction relative to the condensate axis enables tuning of this nonlocal interaction between repulsive and attractive; the latter case supports unusual dark-soliton bound states. Remarkably, these bound states are themselves shown to behave like solitons, emerging unscathed from collisions with each other.

Publication metadata

Author(s): Bland T, Edmonds MJ, Proukakis NP, Martin AM, O'Dell DHJ, Parker NG

Publication type: Article

Publication status: Published

Journal: Physical Review A

Year: 2015

Volume: 92

Print publication date: 01/12/2015

Online publication date: 01/12/2015

Acceptance date: 01/01/1900

Date deposited: 01/12/2015

ISSN (print): 1050-2947

ISSN (electronic): 1094-1622

Publisher: American Physical Society

URL: http://dx.doi.org/10.1103/PhysRevA.92.063601

DOI: 10.1103/PhysRevA.92.063601

Data Access Statement: http://dx.doi.org/10.17634/137139-1

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