Scientists have found that if some radical theories, gravity may play a role in the measurement of time in quantum physics, there must be a limit to how accurately time can be measured. This limit would be imperceptible to us and to our hyper-accurate atomic clocks, but it could reveal more about the nature of gravity in the subatomic world. The study was published in the journal Physical Review Research and found that while these collapse models are accurate, time itself is not exact due to fluctuations in the gravitational field. However, Nicola Bortolotti, a Ph.D. student at the Enrico Fermi Museum and Research Centre, and lead author of the study, suggested that even radical ideas about quantum mechanics can be tested against precise physical measurements.