Extreme many-body scarring in a quantum spin chain via weak dynamical constraints

Abstract

Thermalization is usually difficult to avoid in large complicated quantum systems. However, it was recently discovered that some models with dynamical constraints can fail to thermalize due to quantum many-body scarring. To explore the connection between dynamical constraints and scarring, the authors here construct a class of spin-chain models in which the strength of the constraints can be tuned. It is observed that the scarring becomes more extreme as the constraint is weakened.