Birmingham scientist uses 24,000 chilled atoms to show time can be measured without a clock
At the University of Birmingham, physicist Giovanni Barontini built a small-scale model universe using 24,000 cooled rubidium atoms. The experiment shows that time can be measured by tracking changes in entropy rather than by relying on a conventional clock. This approach offers a new way of thinking about how time is gauged. The model is also being used to explore where general relativity and quantum mechanics produce conflicting results in timekeeping.
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