Eavesdropping on the electron: A new method for extracting data from noise

 https://phys.org/news/2023-11-eavesdropping-electron-method-noise.html

"spin states can be specifically prepared and at the same time determine how long such a state is maintained... quantum dot sample was permanently exposed to an exciting laser and the resulting noise was recorded over a long period of time... extracted the lifetime of the spin states from this apparently random optical signal... now possible to re-evaluate even older, seemingly useless data discovering signals that previously remained hidden... quantum computers"