2015•arXiv (Cornell University)Open access
Entanglement measure and quantum violation of Bell-type inequality for a family of four-qubit entangled states
Dong Ding, Ying-Qiu He, Fengli Yan, Ting Gao
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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.