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.
@article{arxiv.0809.4359,
title = {Proposed Bell experiment with genuine energy-time entanglement},
author = {Adan Cabello and Alessandro Rossi and Giuseppe Vallone and Francesco De Martini and Paolo Mataloni},
journal= {arXiv preprint arXiv:0809.4359},
year = {2009}
}