335 citations
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10 papers · 1 filter
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…
Proposal for direct measurement of concurrence via visibility in a cavity QED system
Sang Min Lee, Se-Wan Ji, Hai-Woong Lee +1
An experimental scheme is proposed that allows direct measurement of the concurrence of a two-qubit cavity system. It is based on the cavity-QED technology using atoms as flying qu…
Scalable cavity-QED-based scheme of generating entanglement of atoms and of cavity fields
Jaehak Lee, Jiyong Park, Sang Min Lee +2
We propose a cavity-QED-based scheme of generating entanglement between atoms. The scheme is scalable to an arbitrary number of atoms, and can be used to generate a variety of mult…
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…
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…
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…