Violation of Bell's inequality in electronic Mach-Zehnder interferometers

TL;DR

This paper proposes a setup using coupled electronic Mach-Zehnder interferometers in mesoscopic conductors to test Bell's inequality, demonstrating violation regardless of coupling strength, thus advancing quantum nonlocality experiments.

Contribution

It introduces a novel experimental setup for testing Bell's inequality in electronic systems with coupled interferometers, showing universal violation.

Findings

Bell's inequality is violated for any coupling strength.

The setup uses quantum Hall regime electron injection.

Potential for new quantum nonlocality tests in mesoscopic conductors.

Abstract

We propose a possible setup of testing the Bell's inequality in mesoscopic conductors. The particular implementation uses two coupled electronic Mach-Zehnder interferometers in which electrons are injected into the conductors in the quantum Hall regime. It is shown that the Bell's inequality is violated for an arbitrary coupling strength between the two interferometers.