Journal
FRONTIERS IN PHYSICS
Volume 9, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fphy.2021.805841
Keywords
exciton-polariton Bose-Einstein condensate; soliton; excitation; Bogoliubov-de Gennes equation; spinor
Categories
Funding
- Zhejiang Provincial Natural Science Foundation of China [LZ21A040001]
- National Natural Science Foundation of China [12074344, 11874038, 11434015, 61835013]
- Natural Science Foundation of China [11835011]
- National Key R&D Program of China [2016YFA0301500]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB01020300, XDB21030300]
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The magnetic soliton is a topological excitation that can appear in a non-equilibrium framework, even with strong spin anisotropic interactions. This unconventional soliton formation may be due to a dissipation-enabled mechanism, offering new possibilities for applications in opto-spintronics.
Magnetic soliton is an intriguing nonlinear topological excitation that carries magnetic charges while featuring a constant total density. So far, it has only been studied in the ultracold atomic gases with the framework of the equilibrium physics, where its stable existence crucially relies on a nearly spin-isotropic, antiferromagnetic, interaction. Here, we demonstrate that magnetic soliton can appear as the exact solutions of dissipative Gross-Pitaevskii equations in a linearly polarized spinor polariton condensate with the framework of the non-equilibrium physics, even though polariton interactions are strongly spin anisotropic. This is possibly due to a dissipation-enabled mechanism, where spin excitation decouples from other excitation channels as a result of gain-and-loss balance. Such unconventional magnetic soliton transcends constraints of equilibrium counterpart and provides a novel kind of spin-polarized polariton soliton for potential application in opto-spintronics.
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