Hybrid ququart-encoded quantum cryptography protected by Kochen-Specker contextuality
2011 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 84, no 3, 030302- p.Article in journal (Refereed) Published
Quantum cryptographic protocols based on complementarity are not secure 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.
Place, publisher, year, edition, pages
2011. Vol. 84, no 3, 030302- p.
IdentifiersURN: urn:nbn:se:su:diva-67269DOI: 10.1103/PhysRevA.84.030302ISI: 000294772000001OAI: oai:DiVA.org:su-67269DiVA: diva2:470955
authorCount :42011-12-302011-12-272011-12-30Bibliographically approved