An ice cube in tea melts without a trace. Similarly, quantum systems usually quickly forget their past. But under strong disorder, many-body localization emerges — particles seem to freeze, preserving memory.
The experiment on IBM's 144-qubit processor lasted 5000 cycles. Spectroscopy (frequency analysis) and Photometry (brightness measurement) showed: under strong disorder, the bonds between particles barely break. Entropy growth slowed so much it looked like a slow-motion replay of a black hole evaporating.
This proves: quantum processors can simulate systems inaccessible to classical computers, paving the way for reliable quantum memory.
For perspective: entropy growth in this experiment was so slow that if your coffee cooled at this rate, it would stay hot longer than the universe has existed.