Abstract
Abstract Thermalization in many-body systems, especially with strong interactions, is a central question in physics. In this work, we present a novel framework for thermalization of interacting wave systems, distinguishing between trivial (no momentum exchange) and nontrivial interactions (signi cant energy redistribution). This distinction leads to a statistically equivalent model with weakened interactions. Applying this to FPUT-like models, we identify a unique double scaling of thermalization times. Crucially, our ndings suggest the persistence of prethermalization in strong interactions.
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