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<p>It has been shown that in one dimension the environment viewed by the particle process (EVP process) in quasi periodic random environment is uniquely ergodic and mixing under mild additional assumptions. Here we construct an analytic quasi periodic environment on higher dimensional torus such that the EVP process is not uniquely ergodic. The stationary measures in this counterexample are necessarily atomless. We show also that the EVP process is mixing with respect to any ergodic stationary measure under some smoothness assumption.</p>

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Simple Random Walks on Higher Dimensional Tori are Mixing and Not Uniquely Ergodic

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年11月24日

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  • Klaudiusz Czudek

摘要

It has been shown that in one dimension the environment viewed by the particle process (EVP process) in quasi periodic random environment is uniquely ergodic and mixing under mild additional assumptions. Here we construct an analytic quasi periodic environment on higher dimensional torus such that the EVP process is not uniquely ergodic. The stationary measures in this counterexample are necessarily atomless. We show also that the EVP process is mixing with respect to any ergodic stationary measure under some smoothness assumption.