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arXiv · 2111.07562

Experimental self-testing for photonic graph states

Jia-Min Xu·Qing Zhou·Yu-Xiang Yang·Zi-Mo Cheng·Xin-Yu Xu·Zhi-Cheng Ren·Xi-Lin Wang·Hui-Tian Wang
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Abstract

Graph states -- one of the most representative families of multipartite entangled states, are important resources for multiparty quantum communication, quantum error correction, and quantum computation. Device-independent certification of highly entangled graph states plays a prominent role in the quantum information processing tasks. Here we have experimentally demonstrated device-independent certification for multipartite graph states, by adopting the robust self-testing scheme based on scalable Bell inequalities. Specifically, the prepared multi-qubit Greenberger-Horne-Zeilinger (GHZ) states and linear cluster states achieve a high degree of Bell violation, which are beyond the nontrivial bounds of the robust self-testing scheme. Furthermore, our work paves the way to the device-independent certification of complex multipartite quantum states.

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Jia-Min Xu, Qing Zhou, Yu-Xiang Yang, Zi-Mo Cheng, Xin-Yu Xu, Zhi-Cheng Ren, Xi-Lin Wang, Hui-Tian Wang. 2021-11-15. Experimental self-testing for photonic graph states. https://doi.org/10.1364/oe.446154

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