Robust method for certifying genuine high-dimensional quantum steering with multimeasurement settings

Genuine high-dimensional (HD) quantum steering was recently proposed for certifying HD entanglement in the onesided device-independent setting, as quantified by the Schmidt number [Phys. Rev. Lett. 126, 200404 (2021)]. As one of the central challenges in the steering test is the tolerated noise threshold, here we develop a more robust method for certifying genuineHDsteering in noisy environments. We derive genuineHDsteering criteria using multiple mutually unbiased bases, surpassing the previous restriction of only two measurement settings. Although the present multisetting criteria are not tight, we theoretically show that they are more robust to noise than the tight two-setting criteria. To test the practicality of our method under realistic conditions, we report an experimental demonstration using photonic orbital angular momentum entangled states in dimensions d = 3, 4, 5. Our work offers a more robust way to witness the entanglement dimension in practical one-sided device-independent quantum information processing. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

Automated summary

The article presents a more robust method for certifying genuine high-dimensional quantum steering in noisy environments, surpassing previous restrictions and demonstrating its practicality through experimental demonstrations.