Experimental Demonstration of Robust Quantum Steering.,Physical Review Letters

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Experimental Demonstration of Robust Quantum Steering.
Physical Review Letters ( IF 8.1 ) Pub Date : 2020-07-10 , DOI: 10.1103/physrevlett.125.020404
Sabine Wollmann _{1,

2} , Roope Uola ₃ , Ana C S Costa ₄

Affiliation

We analyze and experimentally demonstrate quantum steering using criteria based on generalized entropies and criteria with minimal assumptions based on the so-called dimension-bounded steering. Further, we investigate and compare their robustness against experimental imperfections such as misalignment in the shared measurement reference frame. While entropy based criteria are robust against imperfections in state preparation, we demonstrate an advantage in dimension-bounded steering in the presence of measurement imprecision. As steering with such minimal assumptions is easier to reach than fully nonlocal correlations, and as our setting requires very little trust in the measurement devices, the results provide a candidate for the costly Bell tests while remaining highly device independent.

中文翻译：

稳健量子转向的实验演示。

我们使用基于广义熵的标准和基于所谓维数限制的最小假设的标准来分析和实验证明了量子转向。此外，我们调查并比较了它们对实验缺陷（如在共享测量参考框架中未对准）的鲁棒性。虽然基于熵的标准对状态准备中的缺陷具有鲁棒性，但在存在测量不精确性的情况下，我们证明了尺寸约束操纵的优势。由于采用这样的最小假设进行的指导比完全非本地的相关性更容易实现，并且由于我们的设置要求对测量设备的信任度很小，因此结果为昂贵的贝尔测试提供了候选者，同时保持了设备的高度独立性。

更新日期：2020-07-10

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