Bound state of asymmetric pure-quartic solitons in motion

In this Letter, we investigate the binding mechanism and motion dynamics of the bound state consisting of two pure-quartic solitons (PQSs) with unequal intensities and find that their movement occurs as an entity under the Raman self-frequency shift. By calculating the forces that induce the relativ...

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Bibliographic Details
Published in:Optics letters 2024-12, Vol.49 (24), p.7102
Main Authors: Zhang, Chunxiang, Deng, Zhixiang, Ma, Rui, Lu, Haiyang, Fan, Dianyuan, Liu, Jun
Format: Article
Language:English
Subjects:
Asymmetry
Dynamic structural analysis
Frequency shift
Movement
Nonlinear systems
Solitary waves
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Summary:In this Letter, we investigate the binding mechanism and motion dynamics of the bound state consisting of two pure-quartic solitons (PQSs) with unequal intensities and find that their movement occurs as an entity under the Raman self-frequency shift. By calculating the forces that induce the relative motion between the unequal PQSs, we derive the balanced conditions for maintaining a near-constant separation and the constant phase profile between them. The predictions are validated by the numerical simulations. Our work provides insights into the intrinsic features of symmetry-broken localized structures in nonlinear-dispersive systems, stimulating interest in asymmetric multi-soliton states with intriguing dynamics.
ISSN:0146-9592
1539-4794
1539-4794
DOI:10.1364/OL.542762