Quantum Defiance: Ultracold Atoms Resist Heating

In a groundbreaking experiment, scientists cooled 100,000 caesium atoms to near absolute zero and arranged them into ultra-thin tubes. When repeatedly ’kicked’ with laser pulses, the atoms surprisingly maintained uniform velocities instead of dispersing with varying energies as expected. This defiance of thermalisation suggests a quantum state where energy absorption is suppressed.

The phenomenon, theorized since the 1950s, has rarely been observed in such detail. Team member Manuele Landini noted that previous experiments saw eventual heating, but their setup explored new parameters, potentially uncovering novel physics. The findings challenge existing mathematical models, which struggle to predict such behavior beyond a few interacting atoms.

The discovery opens doors for quantum technology applications, as the stable, long-lasting state could enhance sensing or information storage. Researchers plan further tests with thicker atomic tubes and inter-tube movement to unravel the mystery. The study, published in Science, may redefine our understanding of quantum systems and energy dynamics.

QuantumAtomsEntropyThermalisationLasersPhysicsExperimentCaesiumUltracoldEnergy