Associate Professor Miho Fuyama and her colleagues’ paper has been published in Philosophical Transactions of the Royal Society A

Associate Professor Miho Fuyama (RARA Associate Fellow) co-authored a paper with Professor Andrei Khrennikov and Professor Masanao Ozawa, both of whom are collaborators in the JST CREST project “Transition and Effects of Quantum Cognitive States: The Worth and Control of Indeterminacy.” The paper has been published in Philosophical Transactions of the Royal Society A.

The paper proposes sharp repeatable non-projective measurements as a new class of measurements in the research field known as Quantum Cognition or Quantum-like Cognition. This class of measurement can explain phenomena that cannot be accounted for by the widely used projective measurements. Furthermore, it points out that non-classicality has two types: non-commutativity of observables and non-commutativity of state update, indicating that the quantum nature (non-classicality) in cognition may arise not only from the former but also from the latter, or from both.

Paper title: Quantum-like cognition and decision-making in the light of quantum measurement theory
Authors: Miho Fuyama, Andrei Khrennikov (Linnaeus University), Masanao Ozawa (Chubu University, Nagoya University, RIKEN, Ritsumeikan University)
Publication journal: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Publication date: November 27, 2025
URL: https://doi.org/10.1098/rsta.2024.0372