Barium titanate converts electron- into photon- carrying signals; could power quantum computing and cut data center energy use

https://phys.org/news/2025-10-school-material-power-quantum-center.html

"barium titanate reshaped into 40 nm metastable strained thin films converts at room-temperature for fiber optics by >10X than when in bulk form at cryogenic temperature for superconducting qubits... but metastable phase created here not only avoids this cryogenic conversion drop, but also shows exceptional response... future: test concept with other materials... modulators, switches, sensors, quantum communication via fiber optics"