It turns out objects don't need a bunch of chaotic movement to reach a stable temperature; they just need everything to be perfectly symmetrical.
April 13, 2026
Original Paper
Symmetry-driven thermalization via finite de Finetti theorems
arXiv · 2604.09410
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The Takeaway
For centuries, we thought things reached thermal equilibrium because of random, chaotic motion. This discovery suggests that the fundamental geometry of the universe is what actually drives things to settle down.
From the abstract
Thermal behavior in subsystems of closed quantum systems is commonly attributed to dynamical chaos, quantum ergodicity, canonical typicality, or the eigenstate thermalization hypothesis, suggesting a fundamentally statistical origin of thermalization. Here, we propose a potential alternative mechanism in which thermal structures emerge deterministically from symmetry considerations alone, without recourse to statistical arguments. We prove a finite de Finetti-type theorem for quantum states inva