Can photons really spend negative time? New quantum physics experiment on rubidium atoms challenges — What The Economic Times Negative time experiment clears peer review as photons appear to leave an atom cloud before entering — groundbreaking quantum 'negative time' proven after 1 million test runs Tom's Hardware 'Negative time' confirmed: Mind-bending experiment shows light can exit a cloud of atoms before it enters, thanks to quantum physics quirk MSN Physicists Have Measured “Negative Time”