{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"3b78f8fc6308eba30416cbbda53d1646fbb6c47dfe2b5fd444d0d304decb68de","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["4a9b4cb402330cb75f4d148df628669e883750580c6bfece7ec56b60b55e5a04","ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b"],"salt":"65bb8ed6a79c2e2be20f2c0f822d28dc60b0da393ef473068dcce7310ad6a5ad","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"yes-no","assisted_by":[],"external_id":"cm.light-induced-sc.ybco-diamagnetism-replication","kind":"well-posed","literature_status":"contested","n":"2","parents":[],"plain":"In 2024 a group reported that light-driven $\\mathrm{YBa_2Cu_3O_6}$.48 briefly pushes out magnetic field, as a superconductor does. Independent reproduction and other explanations are under discussion.","posed_since":"2024","precise":"Fava et al. (Nature 2024) reported a transient diamagnetic response of about 30 percent of complete expulsion after mid-infrared excitation of $\\mathrm{YBa_2Cu_3O_6}$.48 above its equilibrium $T_{c}$, measured by Faraday rotation in an adjacent magneto-optic layer. Does an independent measurement with a different probe reproduce the effect, and can non-superconducting mechanisms (photoinduced magnetization changes, thermal or eddy-current effects) be excluded? Answer yes or no.","problem_ref":"4a9b4cb402330cb75f4d148df628669e883750580c6bfece7ec56b60b55e5a04","references":"","settled_by":"Reproduction by an independent group with a second probe (e.g. nitrogen-vacancy magnetometry or pickup loops) plus control experiments excluding non-superconducting magnetization.","status_note":"Reported in 2024 (https://doi.org/10.1038/s41586-024-07635-2); interpretation debated.","title":"Independent confirmation of transient diamagnetism in driven $\\mathrm{YBa_2Cu_3O_6}$.48","topic_ref":null},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"df92b96131b6c9361d8c67bc90778218d7c4a5c3504161ced3b93afafa4b1a5f","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"e92f98e03afd9d47b9d16d4d454a03eb9756ffa27e21dde1fa24d29ab44d7411","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"2iC3gOxKBL8U65YC8rqUbo2FWpkZhEQEp2eC9j9RH_B3c7tquEUsBJN9FIKn7z_gJkLEqHusQCv1RPuYIC_dCA"},"schema":"pubphys.envelope/1"},"record_hash":"df92b96131b6c9361d8c67bc90778218d7c4a5c3504161ced3b93afafa4b1a5f","leaf_index":2912}