Lu, I.-T. et al. Cavity engineering of solid-state materials without external driving. Adv. Opt. Photonics 17 , 441–525 (2025). Article   Google Scholar   Zhang, Y. et al. Direct observation of a widely tunable bandgap in bilayer graphene. Nature 459 , 820–823 (2009). Article   ADS   CAS   PubMed   Google Scholar   Kockum, A. F., Miranowicz, A., De Liberato, S., Savasta, S. & Nori, F. Ultrastrong coupling between light and matter. Nat. Rev. Phys. 1 , 19–40 (2019). Article   Google Scholar   Disa, A. S., Nova, T. F. & Cavalleri, A. Engineering crystal structures with light. Nat. Phys. 17 , 1087–1092 (2021). Article   CAS   Google Scholar   Lu, I. et al. Cavity-enhanced superconductivity in MgB 2 from first-principles quantum electrodynamics (QEDFT). Proc. Natl Acad. Sci. USA 121 , e2415061121 (2024). Article   CAS   PubMed   PubMed Central   Google Scholar   Ashida, Y. et al.…