Observation of Quantum Fingerprinting Beating the Classical Limit
Name
PhysRevLett.116.240502.pdf
Size
700.25 KB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Guan, Jian-Yu
Xu, Feihu
Yin, Hua-Lei
Li, Yuan
Zhang, Wei-Jun
Chen, Si-Jing
Yang, Xiao-Yan
Li, Li
You, Li-Xing
Chen, Teng-Yun
Date Issued
June 2016
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Guan, Jian-Yu et al. “Observation of Quantum Fingerprinting Beating the Classical Limit.” Physical Review Letters 116.24 (2016): n. pag. CrossRef. Web. 24 Mar. 2017. © 2016 American Physical Society
Version
Final published version
Abstract
Quantum communication has historically been at the forefront of advancements, from fundamental tests of quantum physics to utilizing the quantum-mechanical properties of physical systems for practical applications. In the field of communication complexity, quantum communication allows the advantage of an exponential reduction in the transmitted information over classical communication to accomplish distributed computational tasks. However, to date, demonstrating this advantage in a practical setting continues to be a central challenge. Here, we report a proof-of-principle experimental demonstration of a quantum fingerprinting protocol that for the first time surpasses the ultimate classical limit to transmitted information. Ultralow noise superconducting single-photon detectors and a stable fiber-based Sagnac interferometer are used to implement a quantum fingerprinting system that is capable of transmitting less information than the classical proven lower bound over 20 km standard telecom fiber for input sizes of up to 2 Gbits. The results pave the way for experimentally exploring the advanced features of quantum communication and open a new window of opportunity for research in communication complexity and testing the foundations of physics.
MIT Department
Massachusetts Institute of Technology. Research Laboratory of Electronics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.116.240502
