Bell's inequality test with time-delayed two-particle correlations

TL;DR

This paper demonstrates how time-delayed two-particle correlations in a mesoscopic physics framework can violate Bell inequalities, revealing non-local quantum effects and linking orbital and spin entanglement.

Contribution

It introduces a Bell test using time-delayed correlations and explores the connection between orbital and spin entanglement in quantum particles.

Findings

Violation of Bell inequality observed with time-delayed correlations

Non-locality manifests in the interference of indistinguishable particles

Orbital and spin entanglement are interconnected through measurement

Abstract

Adopting the frame of mesoscopic physics, we describe a Bell type experiment involving time-delayed two-particle correlation measurements. The indistinguishability of quantum particles results in a specific interference between different trajectories. We show how the non-locality in the time-delayed correlations due to the indistinguishability of the quantum particles manifests itself in the violation of a Bell inequality, where the degree of violation is related to the accuracy of the measurement. We demonstrate how the interrelation between the orbital- and the spin exchange symmetry can by exploited to infer knowledge on spin-entanglement from a measurement of orbital entanglement.