  Bell inequality violation is a quantitative measurement tool for quantum
entanglement. Quantum entanglement is the heart of quantum information science,
in which the resulting nonlocal correlation between remotely separated photons
shows a unique property of quantum mechanics. Here, the role of coincidence
detection is coherently investigated for the nonlocal correlation in a simple
polarization-basis selective non-interferometric system using entangled photon
pairs (Phys. Rev. A 73, 012316 (2006)). The resulting nonlocal quantum feature
between two independent local polarizers is coherently derived for the
joint-parameter relation of the inseparable intensity product. The resulting
coherence solution based on the wave nature of quantum mechanics is thus
understood as a deterministic process via coincidence detection-caused
measurement modification.
