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8 October 2018 Feasibility of quantum fingerprinting using optical signals with random global phase
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Quantum fingerprinting allows two remote parties to determine whether their datasets are identical or different by sending exponentially less information compared to the classical protocol with equivalent performance. Optical implementations of the quantum protocol based on weak coherent states have been proposed and realized. However, in these realizations phase stability between the sending parties is required. Here we analyze the practical feasibility of the recently introduced quantum fingerprinting protocol based on higher-order interference, which does not require a phase lock between transmitters. We show that an experimental demonstration of a quantum fingerprinting protocol beating the known bound on the performance of classical schemes should be possible using currently available technology.
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Michał Lipka, Marcin Jarzyna, and Konrad Banaszek "Feasibility of quantum fingerprinting using optical signals with random global phase", Proc. SPIE 10803, Quantum Information Science and Technology IV, 108030K (8 October 2018);

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