44 citations · 52 across the 8 of their papers we have counts for
8 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…
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…
Necessary and sufficient condition for Greenberger-Horne-Zeilinger diagonal states to be full -partite entangled
Koji Nagata
Recently, [{arXiv:0810.3134}] is accepted and published. We show that any -qubit state which is diagonal in the Greenberger-Horne-Zeilinger basis is full -qubit entangled sta…