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Title: Robust self-testing of multiparticle entanglement
Authors: Wu, Dian
Zhao, Qi
Gu, Xue-Mei
Zhong, Han-Sen
Zhou, You
Peng, Li-Chao
Qin, Jian
Luo, Yi-Han
Chen, Kai
Li, Li
Liu, Nai-Le
Lu, Chao-Yang
Pan, Jian-Wei
Keywords: Science::Physics
Issue Date: 2021
Source: Wu, D., Zhao, Q., Gu, X., Zhong, H., Zhou, Y., Peng, L., Qin, J., Luo, Y., Chen, K., Li, L., Liu, N., Lu, C. & Pan, J. (2021). Robust self-testing of multiparticle entanglement. Physical Review Letters, 127(23), 230503-.
Journal: Physical Review Letters
Abstract: Quantum self-testing is a device-independent way to certify quantum states and measurements using only the input-output statistics, with minimal assumptions about the quantum devices. Because of the high demand on tolerable noise, however, experimental self-testing was limited to two-photon systems. Here, we demonstrate the first robust self-testing for multiphoton genuinely entangled quantum states. We prepare two examples of four-photon graph states, the Greenberger-Horne-Zeilinger states with a fidelity of 0.957(2) and the linear cluster states with a fidelity of 0.945(2). Based on the observed input-output statistics, we certify the genuine four-photon entanglement and further estimate their qualities with respect to realistic noise in a device-independent manner.
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.127.230503
Schools: School of Physical and Mathematical Sciences 
Rights: © 2021 American Physical Society. All rights reserved. This paper was published in Physical Review Letters and is made available with permission of American Physical Society.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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