A one-dimensional superconductor with two boundary magnetic impurities has a special 'supersymmetric' point where the nine degenerate low-energy boundary states form spl(2,1)⊗spl(2,1) representations and support zero energy modes.
Due to this, these two states are degenerate up to exponential in the system size∼e −L
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Emergent boundary supersymmetry in a one dimensional superconductor
A one-dimensional superconductor with two boundary magnetic impurities has a special 'supersymmetric' point where the nine degenerate low-energy boundary states form spl(2,1)⊗spl(2,1) representations and support zero energy modes.