Michael, M. H., Demler, E., Lee, P. A. (2026). Parametrically amplified Josephson plasma waves in YBa
2
Cu
3
O
6+
x
: Evidence for local superconducting fluctuations up to the pseudogap temperature
T
∗. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.2606129123