Scientists discover new type of ultrafast magnetic switching while investigating noise interference

https://phys.org/news/2023-11-scientists-ultrafast-magnetic-noise.html

"antiferromagnetic insulators energy-efficient components in information technology, having hardly any magnetic fields on outside, difficult to characterize physically, yet surrounded by magnetic fluctuations... measure very fast fluctuations (random noise) detected on ultrashort fs time scale... ultrashort light pulses transmitted through magnet with time delay, 1st serves as reference and 2nd contains information about how much antiferromagnet has changed in interim... applications such as random number generators"