Physicists demonstrate emergent time in ultracold atom quantum system

Scientists at the University of Birmingham have demonstrated that the passage of time can arise intrinsically within a quantum system, challenging the conventional view that time requires an external clock. Using a specially prepared ensemble of 24,000 ultracold atoms, the researchers created a controlled “mini‑universe” in which they observed that temporal ordering emerged naturally as the system evolved, without any reference to an outside timekeeping device.

The experiment, conducted with atoms chilled to near absolute zero, allowed the team to monitor subtle changes in the quantum state and to quantify a measurable flow of time based solely on internal dynamics. The findings provide experimental support for theoretical proposals that time may be an emergent property of complex quantum interactions rather than a fundamental backdrop, and they open new avenues for exploring the foundations of physics in laboratory settings.