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arXiv 1802.03540quant-ph
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量子相干性的非定域优势与Bell非定域性的层次性

Hierarchy of the nonlocal advantage of quantum coherence and Bell nonlocality

Ming-Liang Hu, Xiao-Min Wang, Heng Fan

摘要:

量子相干性和非定域性从不同的角度揭示了量子性的本质。对于具有对角关联矩阵的两量子比特态,我们严格证明了量子相干性(NAQC)的非定域优势与Bell非定域性之间的层次关系,即通过在一个量子比特上对另一个量子比特进行局域测量而在另一个量子比特上产生的NAQC捕获的量子关联比Bell非定域性强.对于一般国家,我们的数值结果提出了强有力的证据,这种层次结构可能仍然成立。所以NAQC态形成了一个可以表现出Bell非定域性的态的子集。我们进一步提出了一个NAQC的措施,可用于定量研究它在二分态。

英文摘要:

Quantum coherence and nonlocality capture nature of quantumness from different aspects. For the two-qubit states with diagonal correlation matrix, we prove strictly a hierarchy between the nonlocal advantage of quantum coherence (NAQC) and Bell nonlocality by showing geometrically that the NAQC created on one qubit by local measurement on another qubit captures quantum correlation which is stronger than Bell nonlocality. For general states, our numerical results present strong evidence that this hierarchy may still hold. So the NAQC states form a subset of the states that can exhibit Bell nonlocality. We further propose a measure of NAQC that can be used for a quantitative study of it in bipartite states.

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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