Bayesianism, Conditional Probability and Laplace Law of Succession in Quantum Mechanics

• URL: http://arxiv.org/abs/2112.08622v3
• Date: Thu, 10 Nov 2022 06:19:42 GMT
• Title: Bayesianism, Conditional Probability and Laplace Law of Succession in Quantum Mechanics
• Authors: Tsubasa Ichikawa
• Abstract summary: We show that as with the classical probability, all these issues can be resolved affirmatively in the quantum probability. This implies that the relation between the Bayesian probability and the relative frequency in quantum mechanics is the same as that in the classical probability theory.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We present a comparative study between classical probability and quantum probability from the Bayesian viewpoint, where probability is construed as our rational degree of belief on whether a given statement is true. From this viewpoint, including conditional probability, three issues are discussed: i) Given a measure of the rational degree of belief, does it satisfy the axioms of the probability? ii) Given the probability satisfying these axioms, is it seen as the measure of the rational degree of belief? iii) Can the measure of the rational degree of belief be evaluated in terms of the relative frequency of events occurring? Here we show that as with the classical probability, all these issues can be resolved affirmatively in the quantum probability, provided that the relation to the relative frequency is slightly modified in case of a small number of observations. This implies that the relation between the Bayesian probability and the relative frequency in quantum mechanics is the same as that in the classical probability theory, including conditional probability.

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