Vacuum-boosted superconductivity observed in NbSe2 inside a split-ring cavity

A Nature study reports that embedding NbSe2 in a split-ring cavity resonator increases its superconducting transition temperature, as well as the critical current and critical field near Tc. The results align with theory that hybridization between electronic states and fluctuating cavity modes lowers the superconducting state's energy, providing a noninvasive proof-of-principle that vacuum fluctuations can enhance superconductivity with potential implications for quantum technologies.