We have observed a novel state of matter that, despite being interacting, never thermalizes. In this Many-Body Localized State, the Quantum Matter is literally stuck in unrest: Science 349, 842 (2015)
We have observed a novel state of matter that, despite being interacting, never thermalizes. Such Many-Body Localized States represent a new class of systems that fail to be described by standard thermodynamics and statistical physics and require new theoretical and experimental approaches to characterize them.
See also the MPQ press release.