Deep thermalization and Hilbert space ergodicity
How quantum systems reach ultimate randomness and equilibrium
Physicists have discovered that quantum systems can reach a state of extreme randomness—called deep thermalization—that goes beyond what existing theories predicted. This happens when quantum particles evolve in ways that distribute themselves across all possible states in the most uniform way possible, following principles borrowed from information theory.
Understanding how quantum systems reach equilibrium is essential for building reliable quantum computers and sensors, which currently lose their quantum properties when they interact with their environment. These findings provide tools to predict and measure when quantum devices will thermalize, helping engineers design better quantum technologies and test whether quantum processors are actually working as intended.