Local and Nonlocal Contents in N-qubit generalized GHZ states

Chang-liang Ren; Mahn-soo Choi

doi:10.1103/PhysRevA.82.054102

Local and Nonlocal Contents in N-qubit generalized GHZ states

Quantum Physics 2013-05-29 v2

Authors: Chang-liang Ren , Mahn-soo Choi

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Abstract

We investigate local contents in $N$ -qubit generalized Greenberger, Horne, and Zeilinger (GHZ) states. We suggest a decomposition for correlations in the GHZ states into a nonlocal and fully local part, and find a lower and upper bound on the local content. Our lower bound reproduces the previous result for N=2 [Scarani, Phys. Rev. A. 77, 042112 (2008)] and decreases rapidly with $N$ .

Keywords

N-qubit generalized GHZ states local content nonlocal content correlation decomposition quantum nonlocality

Cite

@article{arxiv.1006.2627,
  title  = {Local and Nonlocal Contents in N-qubit generalized GHZ states},
  author = {Chang-liang Ren and Mahn-soo Choi},
  journal= {arXiv preprint arXiv:1006.2627},
  year   = {2013}
}

Comments

4 pages; 1 figure; figure regenerated; upper bound added; a few more clarifications

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