44 citations · 61 across the 11 of their papers we have counts for
18 papers
Whether quantum mechanics can be almighty even in information science
Koji Nagata, Tadao Nakamura
We discuss that there is a crucial contradiction within quantum mechanics. We derive a proposition concerning a quantum expectation value under the assumption of the existence of t…
Multi-setting Bell inequality for qudits
Se-Wan Ji, Jinhyoung Lee, James Lim +2
We propose a generalized Bell inequality for two three-dimensional systems with three settings in each local measurement. It is shown that this inequality is maximally violated if…
Unconditional no-hidden-variables theorem
Koji Nagata
Recently, [{arXiv:0810.3134}] is accepted and published. We present ultimate version of no-hidden-variables theorem. We derive a proposition concerning the quantum theory under the…
Additional information decreases the estimated entanglement using the Jaynes principle
Koji Nagata
We study a particular example considered in {[Phys. Rev. A {\bf 59,} 1799 (1999)]}, concerning the statistical inference of quantum entanglement using the Jaynes principle. Assume…
There is no axiomatic system for the quantum theory
Koji Nagata
Recently, [arXiv:0810.3134] is accepted and published. We derive an inequality with two settings as tests for the existence of the Bloch sphere in a spin-1/2 system. The probabilit…
Classification of local realistic theories
Koji Nagata
Recently, it has shown that an explicit local realistic model for the values of a correlation function, given in a two-setting Bell experiment (two-setting model), works only for t…