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arXiv:2404.16211v1 Announce Type: new
Abstract: We present a metric, average randomness, that predicts the compatibility of a set of quantum states with the Haar-random distribution, by matching of statistical moments, through a known quantum observable. We show that Haar-randomness is connected to the Dirichlet distribution, and provide a closed-form expression, and simple bounds of the statistical moments. We generalize this metric to permutation- and unitary-equivalent observables, ensuring that if the extended average randomness is compatible with a Haar-random distribution, then the set of states is approximately Haar-random.
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