Experimental Demonstration of High-Dimensional Quantum Steering With $N$ Measurement Settings

12 Jan 2021  ·  Rui Qu, Yunlong Wang, Min An, Feiran Wang, Hongrong Li, Hong Gao, Fuli Li, Pei Zhang ·

High-dimensional (HD) quantum systems possess advantages of larger channel capacity, stronger noise resilience and higher security against attacks in quantum communication compared with qubit systems. Here, we experimentally demonstrate HD quantum steering criterion with $n$ measurement settings in high-noise environments. We verify the unbounded violation of steering equalities, revealing a high strength of steering without full-state tomography. Moreover, our results exhibit that the noise resilience can be enhanced with both extra dimension and measurement settings. We experimentally certify 11-dimensional steering with 60.5% isotropic noise, exceeding the upper bound of 2-setting steering criteria. Our work paves the way for the certification of HD quantum correlations with high noise in quantum information processing.

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Quantum Physics