Hypothesis testing and Stein's lemma in general probability theories with Euclidean Jordan algebra and its quantum realization

• URL: http://arxiv.org/abs/2505.02487v1
• Date: Mon, 05 May 2025 09:11:47 GMT
• Title: Hypothesis testing and Stein's lemma in general probability theories with Euclidean Jordan algebra and its quantum realization
• Authors: Kanta Sonoda, Hayato Arai, Masahito Hayashi,
• Abstract summary: We investigate mathematically minimum structure where Stein's Lemma holds.<n>We prove Stein's Lemma in any model of GPTs generated by EJAs.
• Score: 40.40469032705598
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Even though quantum information theory gives advantage over classical information theory, these two information theories have a structural similarity that many exponet rates of information tasks asymptotically equal to entropic quantities. A typical example is Stein's Lemma, which many researchers still keep interested in. In this paper, in order to analyze the mathemtaical roots of the structural similarity, we investigate mathematically minimum structure where Stein's Lemma holds. We focus on the structure of Euclidean Jordan Algebras (EJAs), which is a generalization of the algebraic structure in quantum theory, and we investigate the properties of general models of General Probabilistic Theories (GPTs) generated by EJAs. As a result, we prove Stein's Lemma in any model of GPTs generated by EJAs by establishing a generalization of information theoretical tools from the mathematical properties of EJAs.

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