Coherence interpretation of the noninterfering Sagnac-based quantum correlation

TL;DR

This paper explores how coincidence detection influences nonlocal quantum correlations in a Sagnac-based system, providing a coherence interpretation that enhances understanding of quantum entanglement measurement.

Contribution

It introduces a coherence-based interpretation of nonlocal correlations in a noninterferometric setup using entangled photons, emphasizing the wave nature of quantum mechanics.

Findings

Coherence interpretation of quantum correlations derived

Coincidence detection modifies measurement outcomes

Deterministic process explained via wave nature

Abstract

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.