This is huge—physicists just pulled off a "negative time" measurement in the lab, and it’s as wild as it sounds. Here’s the breakdown for the group:
Researchers at the University of Toronto just proved that quantum particles can effectively spend a negative amount of time inside a medium. They fired photons through a cloud of ultracold rubidium atoms and found that, in certain cases, the atoms acted as if the photons had already exited before they even finished entering.
u/Linkyjinx — 12 days ago