Hybrid ququart-encoded quantum cryptography protected by Kochen-Specker contextuality
Quantum Physics
2011-09-13 v1
Abstract
Quantum cryptographic protocols based on complementarity are nonsecure against attacks in which complementarity is imitated with classical resources. The Kochen-Specker (KS) theorem provides protection against these attacks, without requiring entanglement or spatially separated composite systems. We analyze the maximum tolerated noise to guarantee the security of a KS-protected cryptographic scheme against these attacks, and describe a photonic realization of this scheme using hybrid ququarts defined by the polarization and orbital angular momentum of single photons.
Keywords
Cite
@article{arxiv.1109.2508,
title = {Hybrid ququart-encoded quantum cryptography protected by Kochen-Specker contextuality},
author = {Adan Cabello and Vincenzo D'Ambrosio and Eleonora Nagali and Fabio Sciarrino},
journal= {arXiv preprint arXiv:1109.2508},
year = {2011}
}
Comments
REVTeX4-1, 5 pages, 2 figures