Perfect Flow: Atoms Defy Friction in Quantum Gas

In a groundbreaking experiment, scientists at TU Wien have observed a physical system exhibiting transport without any degradation, a rare phenomenon that defies everyday physics. By confining thousands of rubidium atoms to move along a single line using magnetic and optical fields, they created an ultracold quantum gas.

This meticulously controlled environment allowed energy and mass to flow with complete efficiency. Published in the journal Science, the results show that the flow remains steady and unchanged even after countless atomic collisions, behaving more like a perfect conductor than typical matter where friction and collisions cause resistance.

The team explained this behavior using an analogy to Newton's cradle, where momentum is conserved and passed on without loss. This unique quantum transport means the atomic cloud does not thermalize according to standard thermodynamic laws, offering new insights into the emergence and disappearance of resistance at the quantum level.