Physicists Identify Minute Fundamental Uncertainty Limiting Ultimate Clock Precision
A team of researchers found that certain quantum collapse models imply a tiny intrinsic fuzziness in time, setting an ultimate bound on how accurately any clock can measure it.
Researchers from Italy, Hungary and the United States investigated how quantum collapse models that incorporate gravity might affect the nature of time. By analyzing the Diósi-Penrose model and Continuous Spontaneous Localization, they established a mathematical connection between these theories and minute gravitational fluctuations in spacetime. The resulting formula predicts a fundamental, extremely small uncertainty in time, imposing a theoretical ceiling on clock precision.
Existing and near-future atomic clocks are many orders of magnitude too coarse to detect this effect, so everyday timekeeping remains unaffected. Nonetheless, the finding provides a potential experimental testbed for distinguishing collapse models from standard quantum mechanics and may shed light on the long-standing challenge of unifying quantum physics with general relativity.
