Efficiency of estimators for locally asymptotically normal quantum statistical models

• URL: http://arxiv.org/abs/2209.00832v1
• Date: Fri, 2 Sep 2022 06:10:05 GMT
• Title: Efficiency of estimators for locally asymptotically normal quantum statistical models
• Authors: Akio Fujiwara and Koichi Yamagata
• Abstract summary: We establish a representation theorem for locallyally normal quantum statistical models. We study the efficiency of quantum estimators such as quantum regular estimators and quantum minimax estimators.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We herein establish an asymptotic representation theorem for locally asymptotically normal quantum statistical models. This theorem enables us to study the asymptotic efficiency of quantum estimators such as quantum regular estimators and quantum minimax estimators, leading to a universal tight lower bound beyond the i.i.d. assumption. This formulation complements the theory of quantum contiguity developed in the previous paper [Fujiwara and Yamagata, Bernoulli 26 (2020) 2105-2141], providing a solid foundation of the theory of weak quantum local asymptotic normality.

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