標題: Entanglement detection via the condition of quantum correlation
作者: Li, Che-Ming
Hsu, Li-Yi
Chen, Yueh-Nan
Chuu, Der-San
Brandes, Tobias
電子物理學系
Department of Electrophysics
公開日期: 1-Sep-2007
摘要: We develop a necessary condition of quantum correlation. It is utilized to construct a d-level bipartite Bell-type inequality which is strongly resistant to noise and requires only analyses of O(d) measurement outcomes compared to the previous result O(d(2)). Remarkably, a connection between the arbitrary high-dimensional bipartite Bell-type inequality and entanglement witnesses is found. Through the necessary condition of quantum correlation, we propose that the witness operators to detect truly multipartite entanglement for a generalized Greenberger-Horne-Zeilinger (GHZ) state with two local measurement settings and a four-qubit singlet state with three settings. Moreover, we also propose a robust entanglement witness to detect a four-level tripartite GHZ state with only two local measurement settings.
URI: http://dx.doi.org/10.1103/PhysRevA.76.032313
http://hdl.handle.net/11536/10349
ISSN: 2469-9926
DOI: 10.1103/PhysRevA.76.032313
期刊: PHYSICAL REVIEW A
Volume: 76
Issue: 3
起始頁: 0
結束頁: 0
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