Balanced pairs of imaginary on-site potentials can be arranged so the transfer matrix becomes SU(2)-like, producing real-energy delocalized states with an exact mobility edge.
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Non-Hermitian delocalization in 1D via emergent compactness
Balanced pairs of imaginary on-site potentials can be arranged so the transfer matrix becomes SU(2)-like, producing real-energy delocalized states with an exact mobility edge.