arXiv 2203.075982022-03-15quant-ph

对二阶量子叠加态中Franson型非定域关联符合探测的理解

Understanding of coincidence detection in Franson-type nonlocal correlations for second-order quantum superposition

B. S. Ham

备注：: 7 pages, 1 figure

摘要：

符合探测是非局域量子关联测量中检验相距较远的局域探测器之间的贝尔不等式违反的关键技术。在局域测量强度均匀的情况下，非局域关联条纹是一种神秘的量子特征，在经典理论中是无法实现的。在这里，符合检测相干调查，以了解通过选定的非本地测量事件之间的二阶量子叠加的非本地相关条纹的基本物理。由于成对光子的相干性特征，符合技术根据成对光子的所选测量基之间的不一致性的经验法则来修改测量事件。这种不相干性是由选定的时间段的重合产生的非局部检测事件之间的量子叠加，其中单独测量的光子之间的相干性是绝对条件。

英文摘要：

Coincidence detection is a key technique used in nonlocal quantum-correlation measurements to test Bell inequality violation between remotely separated local detectors. With individual uniform intensity of local measurements, the nonlocal correlation fringe is a mysterious quantum feature that cannot be achieved classically. Here, the coincidence detection is coherently investigated to understand the fundamental physics of the nonlocal correlation fringe via second-order quantum superposition between selected nonlocal measurement events. Because of the coherence feature of paired photons, the coincidence technique modifies the measurement events for the rule of thumb of indistinguishability between selected measurement bases of paired photons. This indistinguishability is quantum superposition between nonlocally detected events resulting from a selected time slot of coincidence, where coherence between individually measured photons is an absolute condition.

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英文摘要：

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