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首页> 外文期刊>Npj Quantum Information >Experimental test of the Greenberger-Horne-Zeilinger-type paradoxes in and beyond graph states
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Experimental test of the Greenberger-Horne-Zeilinger-type paradoxes in and beyond graph states

机译：格林伯格-Horne-Zeininger型悖论的实验试验和超出图形状态的悖论

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The Greenberger-Horne-Zeilinger (GHZ) paradox is an exquisite no-go theorem that shows the sharp contradiction between classical theory and quantum mechanics by ruling out any local realistic description of quantum theory. The investigation of GHZ-type paradoxes has been carried out in a variety of systems and led to fruitful discoveries. However, its range of applicability still remains unknown and a unified construction is yet to be discovered. In this work, we present a unified construction of GHZ-type paradoxes for graph states, and show that the existence of GHZ-type paradox is not limited to graph states. The results have important applications in quantum state verification for graph states, entanglement detection, and construction of GHZ-type steering paradox for mixed states. We perform a photonic experiment to test the GHZ-type paradoxes via measuring the success probability of their corresponding perfect Hardy-type paradoxes, and demonstrate the proposed applications. Our work deepens the comprehension of quantum paradoxes in quantum foundations, and may have applications in a broad spectrum of quantum information tasks.
机译：Greenberger-Horne-Zeininger（GHz）悖论是一种精致的无流理，可以通过裁定对量子理论的任何局部现实描述来表示经典理论和量子力学之间的急剧矛盾。 GHz型悖论的调查已经在各种系统中进行，并导致了富有成效的发现。然而，其适用性仍然仍然是未知的，尚未发现统一的结构。在这项工作中，我们对图表状态的GHz型悖论统一构建，并表明GHz型悖论的存在不限于图形状态。结果在量子状态验证方面具有重要应用，对混合状态的GHZ型转向悖论的GHZ型转向悖论的构建。我们通过测量其相应的完美硬质悖论的成功概率来进行光子实验以测试GHz型悖论，并展示所提出的应用。我们的工作深化了量子基础的量子悖论，可以在广泛的量子信息任务中具有应用。

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