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Experimental investigation of the robustness against noise for different Bell-type inequalities in three-qubit Greenberger-Horne-Zeilinger states.

Experimental investigation of the robustness against noise for different Bell-type inequalities in three-qubit Greenberger-Horne-Zeilinger states.

Authors :
Huai-Xin Lu
Jia-Qiang Zhao
Lian-Zhen Cao
Xiao-Qin Wang
Source :
Physical Review A: Atomic, Molecular & Optical Physics. Oct2011, Vol. 84 Issue 4-B, p044101-1-044101-5. 5p.
Publication Year :
2011

Abstract

There are different families of inequalities that can be used to characterize the entanglement of multiqubit entangled states by the violation of quantum mechanics prediction versus local realism prediction. In a noisy environment, the violation of different inequalities distinguishes a direct from a noise-free environment. That is, each inequality has a different robustness against noise. We investigate theoretically and experimentally this proposition with the Mermin inequality, Bell inequality, and Svetlichny inequality using three-qubit GHZ states for different levels of noise. Our purpose is to determine which one of the inequalities is more robust against noise and thus more suitable to characterize entanglement of states. Our results show that the Mermin inequality is the most robust against stronger noise and is, thus, more suitable for characterizing the entanglement of three-qubit GHZ states in a noisy environment. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
10502947
Volume :
84
Issue :
4-B
Database :
Academic Search Index
Journal :
Physical Review A: Atomic, Molecular & Optical Physics
Publication Type :
Periodical
Accession number :
70317317
Full Text :
https://doi.org/10.1103/PhysRevA.84.044101