Proposed Bell experiment with genuine energy-time entanglement

TL;DR

This paper proposes a new Bell experiment utilizing genuine energy-time entanglement and a novel interferometer design, which effectively rules out all local hidden variable models and enhances security in quantum cryptography.

Contribution

It introduces a feasible experimental setup with genuine energy-time entanglement that overcomes limitations of previous experiments and closes loopholes in Bell tests.

Findings

The new scheme rules out all local hidden variable models.

It is feasible with current technology.

Improves security in quantum cryptography.

Abstract

Franson's Bell experiment with energy-time entanglement [Phys. Rev. Lett. 62, 2205 (1989)] does not rule out all local hidden variable models. This defect can be exploited to compromise the security of Bell inequality-based quantum cryptography. We introduce a novel Bell experiment using genuine energy-time entanglement, based on a novel interferometer, which rules out all local hidden variable models. The scheme is feasible with actual technology.