Issue |
EPL
Volume 111, Number 4, August 2015
|
|
---|---|---|
Article Number | 40001 | |
Number of page(s) | 4 | |
Section | General | |
DOI | https://doi.org/10.1209/0295-5075/111/40001 | |
Published online | 02 September 2015 |
Scalable Bell inequalities for multiqubit systems
1 College of Physics Science and Information Engineering, Hebei Normal University Shijiazhuang 050024, China
2 Department of Basic Curriculum, North China Institute of Science and Technology - Beijing 101601, China
3 College of Mathematics and Information Science, Hebei Normal University - Shijiazhuang 050024, China
(a) flyan@hebtu.edu.cn
(b) gaoting@hebtu.edu.cn
Received: 12 May 2015
Accepted: 3 August 2015
Based on Clauser-Horne-Shimony-Holt inequality, we show a fruitful method to exploit Bell inequalities for multipartite qubit systems. These Bell inequalities are designed with a simpler architecture tailored to experimental demonstration. With the point of view of the stabilizer formalism, we suggest a method to investigate quantum nonlocality for multipartite systems. Under the optimal setting we derive a set of compact Mermin-type inequalities and then discuss quantum violations for generalized Greenberger-Horne-Zeilinger (GGHZ) states and two kinds of mixed states. Also, as an example, we reveal relationship between quantum nonlocality and four-partite entanglement for four-qubit GGHZ states.
PACS: 03.67.-a – Quantum information / 03.65.Ud – Entanglement and quantum nonlocality (e.g. EPR paradox, Bell's inequalities, GHZ states, etc.)
© EPLA, 2015
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