Abstract
By calculating entanglement measures and quantum violation of Bell-type inequality, we reveal the relationship between entanglement measure and the amount of quantum violation for a family of four-qubit entangled states. It has been demonstrated that the Bell-type inequality is completely violated by these four-qubit entangled states. The plot of entanglement measure as a function of the expectation value of Bell operator shows that entanglement measure first decreases and then increases smoothly with increasing quantum violation.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China under Grant Nos: 11475054, 11371005, 11547169, Hebei Natural Science Foundation of China under Grant Nos: A2014205060, A2016205145, the Research Project of Science and Technology in Higher Education of Hebei Province of China under Grant No: Z2015188, the Graduate Innovation Project of Hebei Province of China under Grant No: sj2015004, Langfang Key Technology Research and Development Program of China under Grant No: 2014011002.
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Ding, D., He, YQ., Yan, FL. et al. Entanglement Measure and Quantum Violation of Bell-Type Inequality. Int J Theor Phys 55, 4231–4237 (2016). https://doi.org/10.1007/s10773-016-3048-1
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DOI: https://doi.org/10.1007/s10773-016-3048-1