@astrotoot@mastodon.online I had to switch to the Quanta's article as this one was written badly imo. Still, there were many things I didn't understand such as how they read the electrons spin accurately and fast enough but then again I'm not an experimental physicist nor quantum one. Also, the main issue with the articles, at least for a passive reader, is that they didn't explain how exactly this is happening without using energy. In my naive brain, the shining of the laser could be transmitting energy to the system via an unknown mechanism so to me, the more interesting physics question is: how did they figure out that there was no energy transferred???