Birmingham physicists create mini universe where time emerges without clock
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Physicists at the University of Birmingham created a "mini universe" using 24,000 ultracold atoms, demonstrating that time can emerge from changes within a quantum system without an external clock. The experiment challenges conventional notions of time as a fundamental dimension.
The Experiment
Researchers at the University of Birmingham trapped 24,000 ultracold atoms in a quantum state, creating a simulated "mini universe." They observed that the flow of time emerged naturally from interactions within the system, without any external clock or timekeeper. The findings were published in the journal Physical Review Letters.
Implications for Physics
The result supports the idea that time may not be a fundamental property of the universe but an emergent phenomenon arising from quantum dynamics. This could have implications for theories of quantum gravity and the nature of spacetime. The experiment provides a controlled platform to study how time emerges in isolated quantum systems.
What's Next
The Birmingham team plans to explore larger quantum systems to see if time emergence scales with complexity. It remains unclear whether this phenomenon holds in all quantum systems or only under specific conditions.
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Birmingham physicists create mini universe where time emerges without clock
