8 citations · 27 across the 8 of their papers we have counts for
8 papers
Optimal CHSH values for regular polygon theories in generalized probabilistic theories
Ryo Takakura
In this study, we consider generalized probabilistic theories (GPTs) and focus on a class of theories called regular polygon theories, which can be regarded as natural generalizati…
Trade-off relations between measurement dependence and hidden information for factorizable hidden variable models
Ryo Takakura, Kei Morisue, Issei Watanabe +1
The Bell theorem is explored in terms of a trade-off relation between underlying assumptions within the hidden variable model framework. In this paper, recognizing the incorporatio…
Programming of channels in generalized probabilistic theories
Takayuki Miyadera, Ryo Takakura
For a given target system and apparatus described by quantum theory, the so-called quantum no-programming theorem indicates that a family of states called programs in the apparatus…
Convexity and uncertainty in operational quantum foundations
Ryo Takakura
To find the essential nature of quantum theory has been an important problem for not only theoretical interest but also applications to quantum technologies. In those studies on qu…
Testing incompatibility of quantum devices with few states
Teiko Heinosaari, Takayuki Miyadera, Ryo Takakura
When observations must come from incompatible devices and cannot be produced by compatible devices? This question motivates two integer valued quantifications of incompatibility, c…
Entropic Uncertainty Relations in a Class of Generalized Probabilistic Theories
Ryo Takakura, Takayuki Miyadera
Entropic uncertainty relations play an important role in both fundamentals and applications of quantum theory. Although they have been well-investigated in quantum theory, little i…
Preparation Uncertainty Implies Measurement Uncertainty in a Class of Generalized Probabilistic Theories
Ryo Takakura, Takayuki Miyadera
In quantum theory, it is known for a pair of noncommutative observables that there is no state on which they take simultaneously definite values, and that there is no joint measure…
Entropy of mixing exists only for classical and quantum-like theories among the regular polygon theories
Ryo Takakura
The thermodynamical entropy of a system which consists of different kinds of ideal gases is known to be defined successfully in the case when the differences are described by class…