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arXiv 1506.01649quant-ph
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用纠缠光子探索量子非定域性的极限

Exploring the limits of quantum nonlocality with entangled photons

Bradley G. Christensen, Yeong-Cherng Liang, Nicolas Brunner, Nicolas Gisin, Paul G. Kwiat

摘要:

量子非定域性可以说是量子理论预言的最违反直觉的现象之一。近年来,非定域性抽象理论的发展使人们对这一问题有了更深入的理解。与此同时,实验进展允许在广泛的物理系统中证明量子非定域性,并使我们接近最终的无空洞贝尔测试。在这里,我们结合这些理论和实验的发展,以探索量子非局域性的限制。这种方法代表了对量子理论的彻底检验,并可能提供超越量子模型的新物理学的证据。使用一个多功能和高保真度源的偏振纠缠光子对,我们探索量子关联的边界,目前报道的最非局域相关性,证明了更多的非局域性与更少的纠缠现象,并表明,非平面(因此复杂)量子位测量可能是必要的,以重现我们观察到的强量子位相关性。我们的结果与量子预言非常一致。

英文摘要:

Quantum nonlocality is arguably among the most counter-intuitive phenomena predicted by quantum theory. In recent years, the development of an abstract theory of nonlocality has brought a much deeper understanding of the subject. In parallel, experimental progress allowed for the demonstration of quantum nonlocality in a wide range of physical systems, and brings us close to a final loophole-free Bell test. Here we combine these theoretical and experimental developments in order to explore the limits of quantum nonlocality. This approach represents a thorough test of quantum theory, and could provide evidence of new physics beyond the quantum model. Using a versatile and high-fidelity source of pairs of polarization entangled photons, we explore the boundary of quantum correlations, present the most nonlocal correlations ever reported, demonstrate the phenomenon of more nonlocality with less entanglement, and show that non-planar (and hence complex) qubit measurements can be necessary to reproduce the strong qubit correlations that we observed. Our results are in remarkable agreement with quantum predictions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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