Majorana edge reconstruction and the ν = 5/2 non-Abelian thermal Hall puzzle.

A neutral-sector Majorana edge reconstruction can screen a Pfaffian or AntiPfaffian bulk so thermal Hall transport matches the experimentally observed ν = 5/2 half-integer quantization linked to the PH-Pfaffian.

• Why it matters: The ν = 5/2 thermal Hall conductance κ is measured in half-integer multiples, which points to neutral Majorana modes, yet the value aligns with PH-Pfaffian despite numerics favoring Pfaffian or AntiPfaffian.
• What they did: Using density-matrix-renormalization group studies of realistic edges plus analytic calculations of edge structure, the work proposes an edge reconstruction acting only on the neutral Majorana sector.
• The result: The proposed reconstruction can make transport signatures indistinguishable from those expected for the PH-Pfaffian, and the authors argue this scenario is consistent with experiment.

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