Experimental quantum fingerprinting with weak coherent pulses

• Main Authors: Xu, Feihu (Contributor), Arrazola, Juan Miguel (Author), Wei, Kejin (Author), Wang, Wenyuan (Author), Palacios-Avila, Pablo (Author), Feng, Chen (Author), Sajeed, Shihan (Author), Lo, Hoi-Kwong (Author), Norbert, Lutkenhaus (Author)
• Other Authors: Massachusetts Institute of Technology. Research Laboratory of Electronics (Contributor)
• Format: Article
• Language: English
• Published: Nature Publishing Group, 2016-01-18T22:36:08Z.
• Subjects: Article
• Online Access: Get fulltext

Quantum communication holds the promise of creating disruptive technologies that will play an essential role in future communication networks. For example, the study of quantum communication complexity has shown that quantum communication allows exponential reductions in the information that must be transmitted to solve distributed computational tasks. Recently, protocols that realize this advantage using optical implementations have been proposed. Here we report a proof-of-concept experimental demonstration of a quantum fingerprinting system that is capable of transmitting less information than the best-known classical protocol. Our implementation is based on a modified version of a commercial quantum key distribution system using off-the-shelf optical components over telecom wavelengths, and is practical for messages as large as 100 Mbits, even in the presence of experimental imperfections. Our results provide a first step in the development of experimental quantum communication complexity.
United States. Office of Naval Research
United States. Air Force Office of Scientific Research
National Natural Science Foundation (China) (Grant 61178010)
China Scholarship Council (201406470051)
Hong Kong University. Physics Department Summer Overseas Research Program
Hong Kong University (Science Faculty Overseas Research Fellowship)
Peru. Consejo Nacional de Ciencia, Tecnologia e Innovacion Tecnologica
Institute for Quantum Computing
Institute for Quantum Computing (Summer Undergraduate Research Award)
Natural Sciences and Engineering Research Council of Canada (Postdoctoral Fellowship Program)
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