44 citations · 61 across the 11 of their papers we have counts for
7 papers · 1 filter
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…
Multipartite positive-partial-transpose inequalities exponentially stronger than local reality inequalities
Koji Nagata
We show that positivity of {\it every} partial transpose of -partite quantum states implies new inequalities on Bell correlations which are stronger than standard Bell inequalit…
Realism violates quantum mechanics
Koji Nagata
Recently, [{arXiv:0810.3134}] is accepted and published. We show that local realistic theories violate separability of -qubit quantum states by a factor of . Thus we have a…
Multipartite omnidirectional generalized Bell inequality
Koji Nagata
We derive a multipartite generalized Bell inequality which involves the entire range of settings for each of the local observers. Especially, it is applied to show non-local behavi…