Key points are not available for this paper at this time.
According to quantum statistical mechanics, generic many-body systems decohere and thermalize regardless of their initial state. A recent experiment found a surprising exception to this rule, wherein an otherwise thermalizing system maintains its coherence only for a particular initial condition, a phenomenon dubbed ``quantum many-body scarring.'' Here, the authors propose and provide numerical evidence for a physical mechanism underlying the observed phenomena: Bose-Einstein condensation, wherein macroscopic numbers of quasiparticles occupy a single quantum state. While this phenomenon is well known at equilibrium, its emergence in a strongly interacting, far-from-equilibrium system is striking and unexpected. The physical principle explored in this work can be applied to other systems to reveal new examples of quantum many-body scars.
Iadecola et al. (2019) studied this question.