{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"e169673207a4fe9e8700100d760772917ab9fb8ff39244bd772da39f8347ade5","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b","dce8117d256a2b12af17c37950be9b00c662b51d3774ee15aab65257c7cbbcc5"],"salt":"990409f851a35b0e44d2f47e678cbce03864dd3c9f53ba71b99eab2221cb9efa","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"yes-no","assisted_by":[],"external_id":"cm.majorana-zero-modes.nanowire-topological-phase","kind":"well-posed","literature_status":"contested","n":"2","parents":[],"plain":"Many experiments on superconductor-coated semiconductor wires saw signals expected from Majorana modes, but ordinary bound states caused by disorder give similar signals, so it is unproven that any wire has become topological.","posed_since":"2010","precise":"For InAs-Al or InSb-Al hybrid nanowires in a parallel magnetic field, establish whether a topological phase exists: bulk gap closing and reopening at Zeeman energy $E_Z = \\sqrt{\\Delta^2 + \\mu^2}$, with zero-bias conductance peaks at both ends whose splitting decays exponentially with wire length. An answer is yes or no, based on three-terminal data passing pre-registered criteria that disorder simulations show trivial states cannot pass.","problem_ref":"dce8117d256a2b12af17c37950be9b00c662b51d3774ee15aab65257c7cbbcc5","references":"","settled_by":"Three-terminal nonlocal conductance showing gap reopening and end-to-end correlated zero modes, reproduced across devices with data and analysis code released.","status_note":"Microsoft's topological-gap-protocol devices (Phys. Rev. B 107, 245423, 2023) were challenged in a 2025 comment (arXiv:2502.19560) arguing that the protocol outcome depends on analysis choices.","title":"Has a semiconductor nanowire reached the topological superconducting phase?","topic_ref":null},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"53c65f0ca26def1d43eea20e21f30c4e9c6d67987289a3732ac3d98e48d55d80","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"a26e1673669ccf8902f5bec981d84677eeb9ad7acf336d0122140f0d84af03f8","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"najimN8NoZR3my7-a1DB2RpJp2JdOW_yEDXgUoOHqoROWG9JEA1JP_PtMU6OiYRl9jtTmnTqabSQJ4RcdsqQCw"},"schema":"pubphys.envelope/1"},"record_hash":"53c65f0ca26def1d43eea20e21f30c4e9c6d67987289a3732ac3d98e48d55d80","leaf_index":2926}