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arXiv · 2503.06590

Interaction-free ergodicity-breaking driven by temporally hyperuniform noise

Harukuni Ikeda
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Abstract

We show that norm-conserving spin models driven by temporally hyperuniform noise exhibit a sharp ergodicity-breaking transition in the absence of interactions. In the nonergodic phase, the dynamics freeze into configurations determined by the initial condition. Our analysis demonstrates that such interaction-free ergodicity breaking arises generically whenever a global constraint is imposed and the driving noise is class-I hyperuniform, the strongest form in Torquato's classification. The transition can also be interpreted as a condensation of fluctuations into the zero-frequency mode, reminiscent of Bose--Einstein condensation in an ideal gas.

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Harukuni Ikeda. 2025-03-09. Interaction-free ergodicity-breaking driven by temporally hyperuniform noise. https://doi.org/10.1103/g921-ppyv

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