Physicists Harvest Work from Environmental Memory in Non-Markovian Systems
Researchers at the University of Konstanz have experimentally demonstrated that hidden environmental memory can be converted into usable work, challenging the standard assumption that information engines operate in memoryless (Markovian) environments. By using a silica particle trapped in a viscoelastic micellar solution, the team showed that delayed measurements can retrieve information stored in the bath's hidden degrees of freedom. This 'information backflow' allowed them to extract work exceeding the theoretical limits of a Markovian system, specifically reaching three times the energy bound of the observable particle alone in certain states. The study establishes environmental memory as a tangible thermodynamic resource, providing a new framework for optimizing information engines in complex, time-correlated environments.