How Peking University Engineers Control Prethermalization via Band Structure

Researchers at Peking University and collaboration institues are University of Cambridge and Technical University of Munich, have uncovered a family of many-body periodic orbits within a periodically driven spin system, challenging expectations about how these systems behave outside of traditionally studied high-frequency conditions. The team, led by Jianan Wang and Yang Hou, reports demonstrating that perturbations to these stable orbits exhibit a description akin to a quasiparticle band structure, a concept more commonly associated with static materials. This work aims to resolve the tension between predictions of stable orbits and established thermodynamic principles. In particular, the researchers…