Microsoft Rejects Legg's Critique of 2025 Topological Qubit Paper

1 articles · Updated · Hackaday · Jun 30

Microsoft said Henry F. Legg’s Nature critique does not undermine its 2025 paper, maintaining that it detected topological qubits and that the core conclusions remain valid.
Legg had argued the analysis selectively favored supportive data and contained Python indexing mistakes; after correcting those errors, he said the same measurements produced different results and could reflect quantum dots instead.
Microsoft replied that its Topological Gap Protocol was only a tuning procedure, not the basis for interpreting the RF signals behind the paper’s main claims, and said Legg offered no alternative model matching the observed capacitance and RTS signatures.
The dispute keeps Microsoft’s Majorana-based topological computing effort under scrutiny after earlier peer-review challenges, with independent reproduction likely to decide whether the claimed breakthrough holds.