Unidirectional flow of flat-top solitons

We numerically demonstrate the unidirectional flow of flat-top solitons when interacting with two reflectionless potential wells with slightly different depths. The system is described by a nonlinear Schrödinger equation with dual nonlinearity. The results show that for shallow potential wells, the...

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Bibliographic Details
Published in:Physics letters. A 2023-11, Vol.487, p.129120, Article 129120
Main Authors: Alotaibi, M.O.D., Al Sakkaf, L., Al Khawaja, U.
Format: Article
Language:English
Subjects:
Flat-top soliton
Reflectionless potential
Unidirectional flow
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Summary:We numerically demonstrate the unidirectional flow of flat-top solitons when interacting with two reflectionless potential wells with slightly different depths. The system is described by a nonlinear Schrödinger equation with dual nonlinearity. The results show that for shallow potential wells, the velocity window for unidirectional flow is larger than for deeper potential wells. A wider flat-top solitons also have a narrow velocity window for unidirectional flow than those for thinner flat-top solitons. •Flat-top soliton's unidirectional flow was shown numerically with split-step and power series methods.•It is shown that the unidirectional flow behavior disappears for specific flat-top soliton widths.•Wider flat-top solitons have a narrower velocity range for unidirectional flow than thinner ones.
ISSN:0375-9601
DOI:10.1016/j.physleta.2023.129120