Deterministic quantum correlation between coherently paired photons acting on a beam splitter

TL;DR

This paper demonstrates that paired photons can exhibit deterministic and macroscopic quantum correlations through phase manipulation on a beam splitter, challenging the traditional probabilistic view of entanglement.

Contribution

It introduces a novel approach showing that quantum correlations between paired photons can be deterministic and macroscopic, expanding understanding beyond conventional probabilistic entanglement.

Findings

Deterministic quantum correlation observed between paired photons.

Phase basis manipulation enables macroscopic quantum effects.

Challenges the notion that entanglement must be probabilistic.

Abstract

Quantum technologies based on the particle nature of a photon has been progressed over the last several decades, where the fundamental quantum features of entanglement have been tested by Hong-Ou-Mandel-type anticorrelation and Bell-type nonlocal correlation. Recently, mutually exclusive quantum features based on the wave nature of a photon have been investigated to understand the fundamental physics of mysterious quantum correlation, resulting in deterministic and macroscopic quantum technologies. Here, we study the quantum natures of paired photons acting on a beam splitter, where mutual coherence plays a major role. Unlike current common understanding on anticorrelation, bipartite entanglement between paired photons does not have to be probabilistic or post-selected, but can be deterministic and even macroscopic via phase basis manipulation without violating quantum mechanics.