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Saratov Fall Meeting: Laser Physics, Photonic Technologies, and Molecular Modeling

Light with orbital angular momentum and encryption algorithms

Alexander V. Gorokhov, Бурлов С. А.

Published Apr 26, 2018• 0 citations
Publisher
DOI
10.1117/12.2315327

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An algorithm for applying a ”twisted” light for constructing an encryption scheme is described. Our approach is founded on famous classical symmetric permutation algorithm based on NP-full task for ”Knapsack Problem” with changes taken into account the quantum origin of the information carrier. As a measuring device for selection of pure states from a mixed one, the Mach-Zehnder interferometer cascade is supposed to use, which allows sorting the parity of the mixed state of the orbital angular momentum (OAM) of photons.
The creation and detection of light carrying orbital angular momentum (OAM) has been studied over the past 30 years. Recently, efforts have been made to efficiently generate multiple OAM components within a single beam, which has led to the generation of the first classical OAM combs. Here we present, to the best of our knowledge, the generation of the first quantum OAM combs utilizing the OAM correlations of a bi-photon state. The OAM correlations are tailored using binary phase gratings in order to achieve numerous OAM comb structures. These states could provide potential benefits when being applied in quantum sensing or high dimensional quantum encryption.