Hybrid ququart-encoded quantum cryptography protected by Kochen-Specker contextuality
Authors: Cabello A., D’Ambrosio V., Nagali E., Sciarrino F.
Autors Affiliation: Departamento de Fısica Aplicada II, Universidad de Sevilla, E-41012 Sevilla, Spain; Department of Physics, Stockholm University, S-10691 Stockholm, Sweden; Dipartimento di Fisica della “Sapienza” Universit`a di Roma, I-00185 Roma, Italy; Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche (INO-CNR), I-50125 Florence, Italy
Abstract: 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.
Journal/Review: PHYSICAL REVIEW A
Volume: 84 (3) Pages from: 030302 to: 030302
More Information: We acknowledge helpful discussions with E. Karimi and L. Marrucci. This work was supported by the MICINN Project No. FIS2005-07689, the Wenner-Gren Foundation, FIRB Futuro in Ricerca-HYTEQ, and Project PHORBITECH of the Future and Emerging Technologies (FET) program within the Seventh Framework Programme for Research of the European Commission, under FET-Open Grant No. 255914.DOI: 10.1103/PhysRevA.84.030302Citations: 30data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2019-09-15References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here