What if time doesn't actually exist until something changes? Scientists at the University of Birmingham created a tiny "mini universe" using 24,000 ultracold atoms and showed that the flow of time can emerge naturally from changes inside a quantum system, without relying on any external clock.
In a study published in Physical Review Research, Professor Giovanni Barontini demonstrates that it is possible to measure the passage of time without relying on a clock. Instead, the experiment shows that a version of time can emerge naturally from ... [4545 chars]