423 citations · 3.1k across the 93 of their papers we have counts for
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Quantum set theory: quantum conditionals and order of observable
Masanao Ozawa
A difficulty in quantum logic is the well-known arbitrariness in choosing a binary operation for conditional among three principal candidates called the Sasaki, the contrapositive…
Disturbance Evaluation Circuit in Quantum Measurement
Haruki Emori, Masanao Ozawa, Akihisa Tomita
According to the uncertainty principle, every quantum measurement accompanies disturbance. In particular, accurate sequential measurements need the accurate control of disturbance.…
Logical Characterization of Contextual Hidden-Variable Theories based on Quantum Set Theory
Masanao Ozawa
While non-contextual hidden-variable theories are proved to be impossible, contextual ones are possible. In a contextual hidden-variable theory, an observable is called a beable if…
Limitations of Quantum Measurements and Operations of Scattering Type under the Energy Conservation Law
Ryota Katsube, Masanao Ozawa, Masahiro Hotta
It is important to improve the accuracy of quantum measurements and operations both in engineering and fundamental physics. It is known, however, that the achievable accuracy of me…
Quantum Measurement Theory for Systems with Finite Dimensional State Spaces
Masanao Ozawa
In this paper, we present a general theory of finite quantum measurements, for which we assume that the state space of the measured system is a finite dimensional Hilbert space and…
Quantum Disturbance without State Change: Soundness and Locality of Disturbance Measures
Masanao Ozawa
It is often supposed that a quantum system is not disturbed without state change. In a recent debate, this assumption is used to claim that the operator-based disturbance measure,…