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Hybrid ququart-encoded quantum cryptography protected by Kochen-Specker contextuality
Stockholm University, Faculty of Science, Department of Physics.
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
Abstract [en]

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.
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Natural Sciences
Identifiers
URN: urn:nbn:se:su:diva-67269DOI: 10.1103/PhysRevA.84.030302ISI: 000294772000001OAI: oai:DiVA.org:su-67269DiVA: diva2:470955
Note
authorCount :4Available from: 2011-12-30 Created: 2011-12-27 Last updated: 2017-12-08Bibliographically approved

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