I read it mentioned in “The Flicker Men” by Ted Kosmatka. Then, I researched it, and found it in this article:
https://www.forbes.com/sites/startswithabang/2019/09/18/this-one-experiment-reveals-more-about-reality-than-any-quantum-interpretation-ever-will/
The question is, is it real? Do we believe it? And what does it do?
or