title: Extreme violation of local realism with a hyper-entangled four-photon-eight-qubit Greenberger-Horne-Zelinger state.
abstract: The highest qubit Ardehali inequality violation with 203 standard deviations is first experimentally demonstrated using the hyper-entangled four-photon-eight-qubit Greenberger-Horne-Zeilinger (GHZ) state. Moreover, we experimentally investigate the robustness of the Ardehali inequality for the four-, six-, and eight-qubit GHZ states in a rotary noisy environment systematically. Our results first validate the Ardehali' theoretical statement of relation between violation of Ardehali inequality and particle number, and proved that Ardehali inequality is more robust against noise in larger number qubit GHZ states, and provided an experimental benchmark for us to estimate the safety of quantum channel in the noisy environment.
authors.affiliation: Department of Physics and Electronic Science, Weifang University, Weifang, Shandong 261061, China.
authors.forename: Huai-Xin
authors.initials: HX
authors.lastname: Lu
authors.affiliation: Department of Physics and Electronic Science, Weifang University, Weifang, Shandong 261061, China.
authors.forename: Lian-Zhen
authors.initials: LZ
authors.lastname: Cao
authors.affiliation: Department of Physics and Electronic Science, Weifang University, Weifang, Shandong 261061, China.
authors.forename: Jia-Qiang
authors.initials: JQ
authors.lastname: Zhao
authors.affiliation: Department of Physics and Electronic Science, Weifang University, Weifang, Shandong 261061, China.
authors.forename: Ying-De
authors.initials: YD
authors.lastname: Li
authors.affiliation: Department of Physics and Electronic Science, Weifang University, Weifang, Shandong 261061, China.
authors.forename: Xiao-Qin
authors.initials: XQ
authors.lastname: Wang