Coherently controlled quantum features in a coupled interferometric scheme

TL;DR

This paper investigates the quantum features in a coupled interferometric scheme using coherence optics and proposes a deterministic method for on-demand entangled photon-pair generation to enhance quantum processing control.

Contribution

It introduces a coherence-based approach to understand quantum features and presents a new deterministic method for generating entangled photon pairs on demand.

Findings

Quantum features originate from coherence in the interferometric scheme.

A deterministic entangled photon-pair generation method is proposed.

Enhanced control over quantum processing is achieved.

Abstract

Over the last several decades, entangled photon pairs generated by spontaneous parametric down conversion processes in both second-order and third-order nonlinear optical materials have been intensively studied for various quantum features such as Bell inequality violation and anticorrelation. In an interferometric scheme, anticorrelation results from photon bunching based on randomness when entangled photon pairs coincidently impinge on a beam splitter. Compared with post-measurement-based probabilistic confirmation, a coherence version has been recently proposed using the wave nature of photons. Here, the origin of quantum features in a coupled interferometric scheme is investigated using pure coherence optics. In addition, a deterministic method of entangled photon-pair generation is proposed for on-demand coherence control of quantum processing.