We prove that the exponential decay rate in expectation is well defined and is equal to the Lyapunov exponent, for supercritical almost Mathieu operators with Diophantine frequencies.

中文翻译：

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几乎 Mathieu 算子的精确动态衰减率

我们证明，对于具有丢番图频率的超临界几乎 Mathieu 算子，期望中的指数衰减率是明确定义的并且等于 Lyapunov 指数。