In a non-Hermitian skyrmion, the right-state charge is homotopy-protected while the biorthogonal charge loses quantization at a real-space exceptional ring on the equator.
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A real-space exceptional ring mediates an eigenframe-charge transition in a non-Hermitian skyrmion
In a non-Hermitian skyrmion, the right-state charge is homotopy-protected while the biorthogonal charge loses quantization at a real-space exceptional ring on the equator.