Detection of N-particle entanglement with generalized Bell inequalities

Details Detection of N-particle entanglement with generalized Bell inequalities Detection of N-particle entanglement with generalized Bell inequalities

2005-10-03

arxiv.org/abs/quant-ph/0510019v2

Phys. Rev. A 72, 062112 (2005)

Physics

Quantum Physics

5 pages, minor typos corrected, journal version

Scientific paper

10.1103/PhysRevA.72.062112

We show that the generalized Bell-type inequality, explicitly involving rotational symmetry of physical laws, is very efficient in distinguishing between true N-particle quantum correlations and correlations involving less particles. This applies to various types of generalized partial separabilities. We also give a rigorous proof that the new Bell inequalities are maximally violated by the GHZ states, and find a very handy description of the N-qubit correlation function.

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