Quantum optical fingerprinting without a shared phase reference

Presenting Author: Konrad Banaszek, University of Warsaw
Contributing Author(s): Michal Jachura, Marcin Jarzyna, Michal Lipka, Wojciech Wasilewski

Quantum fingerprinting allows two remote parties to determine whether their datasets are identical or different by transmitting exponentially less information compared to the classical protocol with equivalent performance. Standard optical implementations of quantum fingerprinting based on coherent states of light require phase stability between the sending parties. Here we present a quantum fingerprinting protocol which exploits higher-order optical interference between optical signals with a random global phase. Its performance has been verified in a proof-of-principle experiment discriminating between binary visibility hypotheses. Actual demonstration of quantum advantage over the known bound on the performance of classical fingerprinting protocols should be possible using currently available technology.

Read this article online: https://doi.org/10.1364/OE.25.027475, https://doi.org/10.1103/PhysRevLett.120.110502

(Session 8 : Monday from 2:15pm - 2:45pm)


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