Wiring up quantum circuits with light

https://phys.org/news/2023-05-wiring-quantum-circuits.html

"entangled low-energy microwave with high-energy optical photons... superconducting cavity houses crystal and enhances interaction... laser  send billions optical photons into electro-optic crystal for fraction of microsecond... optical photon splits, entangles, optical and microwave photon... avoids a breakdown of superconductivity, but it also helps to cool the device more effectively and to keep it cold during the short timescales of the optical laser pulses... quantum network and quantum-enhanced sensing"

Related: Widely tuneable terahertz lasers boost photo-induced superconductivity in K₃C₆₀

https://phys.org/news/2023-10-widely-tuneable-terahertz-lasers-boost.html