Efficient quantum frequency converter translates single photons across different wavelengths without destroying their quantum state

https://www.eurekalert.org/news-releases/1141296

"trade-off between maximizing energy conversion efficiency/ minimizing phase distortion... overcome connecting disparate quantum platforms using gas-filled hollow-core optical fibers to translate quantum light across widely separated wavelengths, carefully balancing both parameters to preserve delicate coherent information... modeled 4-wave mixing inside xenon-filled hollow capillary fibers showed high phase fidelity light signal conversion across these optical bands"