| viXra.org > Quantum Physics > viXra:1511.0179 |
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| viXra.org > Quantum Physics > viXra:1511.0179 |
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Quantum Physics |
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Authors: Koji Nagata, Tadao Nakamura
In trial, we especially consider inequalities for confirming multipartite entanglement from experimental data obtained in Bell-type experiments. We present new entanglement witness inequalities. Some physical situation is that we measure $\sigma_x$, $\sigma_y$, and $\sigma_z$ per side. Our analysis discovers a new multipartite entangled state and it is experimentally feasible. If the reduction factor $V$ of the interferometric contrast observed in a $N$-particle correlation experiment is $V>0.4$, then a measured state is full $N$-partite entanglement in a significant specific case. It is not revealed by previous Bell-type experimentally feasible methods presented in \cite{NKI}, which states if $V>0.5$ then the significant specific type state is full $N$-partite entanglement.
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[v1] 2015-11-19 23:23:59
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