Non-Hermitian skyrmions carry two topological charges that coincide in the Hermitian limit but one breaks down at exceptional points where the biorthogonal Bloch field diverges.
exceptional points as manifestations of topological-charge breakdown in a non-hermitian skyrmion
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Exceptional Points as Manifestations of Topological-Charge Breakdown in a Non-Hermitian Skyrmion
Non-Hermitian skyrmions carry two topological charges that coincide in the Hermitian limit but one breaks down at exceptional points where the biorthogonal Bloch field diverges.