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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 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