Nature CommunicationsMeasurement of a strong nonlinear force between superconductors compatible with the Casimir forceMatthijs H. J. de JongEvren KorkmazgilLouise BanniardMika A. SillanpääLaure Mercier de Lépinay2026-07-16Full textDOI https://doi.org/10.1038/s41467-026-75261-9