Barontini Shows Event Order Without a Clock Using 24,000 Rubidium Atoms
Updated
Updated · Holistic News · Jul 8
Barontini Shows Event Order Without a Clock Using 24,000 Rubidium Atoms
3 articles · Updated · Holistic News · Jul 8
Summary
About 24,000 ultracold rubidium atoms let Giovanni Barontini test whether “before” and “after” can be identified inside a fully isolated system, without any external clock.
In the optical-trap experiment, a Bose-Einstein condensate was split into visible and hidden regions; atoms still moved between them, and the visible side’s population repeatedly rose and fell.
Those oscillations mathematically resembled expansion-and-contraction cosmological models, giving researchers an internal sequence of change from which event order could be inferred.
The Physical Review Research study does not define what time is, but it offers a laboratory route into the “problem of time” that blocks efforts to reconcile general relativity with quantum mechanics.
That makes the atom cloud a controllable stand-in for questions tied to quantum gravity, black holes and the early universe, shifting some debate from equations to experiments.
Scientists can now create time from disorder, while others can reverse its arrow. Which experiment reveals time's true nature?
If our ignorance creates time, would an all-knowing observer perceive a universe where time simply doesn't exist?
Experimental Mini-Universe Shows Time Can Emerge from Within Quantum Systems
Overview
In June 2026, Professor Giovanni Barontini and his team at the University of Birmingham made a major breakthrough by building a 'mini-universe' in the lab. Their experiment provided the first controlled evidence that time can emerge from within a quantum system, rather than being imposed from outside. By observing how atoms moved between different regions and how their disorder, or entropy, changed, the researchers showed that time could be generated from the behavior of matter itself. This challenges old ideas about time and suggests it is an emergent property, opening new ways to understand the universe.