Nature CommunicationsSpectral signature of high-order photon processes enhanced by Cooper-pair pairingW. C. SmithA. BorgognoniM. VilliersE. Roverc’hJ. PalomoM. R. DelbecqT. KontosP. Campagne-IbarcqB. DouçotZ. Leghtas2025-09-24Full textDOI https://doi.org/10.1038/s41467-025-62047-8