{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"48e1cda83016ce71ffd9989bbaa779ea235fb0f9390b40e13ba9c85278cc8944","created":"2026-10-03T07:18:00Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"a7ebc995d2c152fb42a9bcc5a4aca5a0d78ce15dae92d18405e20a7096901298","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"yes-no","assisted_by":[],"external_id":"cm.majorana-zero-modes.majorana-braiding","kind":"well-posed","literature_status":"open","n":"1","parents":[],"plain":"The decisive test of Majorana modes is that exchanging or combining them changes a quantum state in a way ordinary particles cannot, and no platform has shown this.","posed_since":"2011","precise":"In any Majorana platform, demonstrate the non-Abelian fusion rule (two Majoranas from different pairs fuse to even or odd parity with probability $1/2$ each) or a braiding or measurement sequence implementing the exchange operator $\\exp(\\pi \\gamma_1 \\gamma_2 / 4)$, $\\gamma_i$ Majorana operators. An answer is measured outcome statistics and gate fidelity that a trivial Andreev-state model cannot reproduce.","problem_ref":null,"references":"","settled_by":"A measurement-based braiding protocol with parity readout showing the predicted statistics in a device whose topological phase is independently established.","status_note":"Microsoft reported X and Z parity measurements in a tetron device (arXiv:2507.08795, 2025), a prerequisite for measurement-based braiding; no fusion-rule or braiding statistics have been demonstrated as of 2026.","title":"Non-Abelian exchange or fusion of Majorana zero modes","topic_ref":"22b1c284f405dca649b67435bdabcd2fe6cb89dca2e57c0dd9c49b870c73940e"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"c453d0dddb255e9f947c497f13f4c11dc9556ac1e523ab30e6f1136eddfe1f0f","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"420eb367ddc3a0d3eda598909476b3394cf671fce016656b80c1f94d8ab78973","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"dkyxw_hhS7teqRPMzwmsNKCcppECa5-iPsyQ4O7ZP147hkc6bqvpVLIUafj1t62Isxzri09Dlvsr3QqIhUnaAw"},"schema":"pubphys.envelope/1"},"record_hash":"c453d0dddb255e9f947c497f13f4c11dc9556ac1e523ab30e6f1136eddfe1f0f","leaf_index":1080}