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Demonstration of monogamy relations for Einstein-Podolsky-Rosen steering in Gaussian cluster states

Deng, Xiaowei; Xiang, Yu; Tian, Caixing; Adesso, Gerardo; He, Qiongyi; Gong, Qihuang; Su, Xiaolong; Xie, Changde; Peng, Kunchi

Authors

Xiaowei Deng

Yu Xiang

Caixing Tian

Qiongyi He

Qihuang Gong

Xiaolong Su

Changde Xie

Kunchi Peng



Abstract

Understanding how quantum resources can be quantified and distributed over many parties has profound applications in quantum communication. As one of the most intriguing features of quantum mechanics, Einstein-Podolsky-Rosen (EPR) steering is a useful resource for secure quantum networks. By reconstructing the covariance matrix of a continuous variable four-mode square Gaussian cluster state subject to asymmetric loss, we quantify the amount of bipartite steering with a variable number of modes per party, and verify recently introduced monogamy relations for Gaussian steerability, which establish quantitative constraints on the security of information shared among different parties. We observe a very rich structure for the steering distribution, and demonstrate one-way EPR steering of the cluster state under Gaussian measurements, as well as one-to-multimode steering. Our experiment paves the way for exploiting EPR steering in Gaussian cluster states as a valuable resource for multiparty quantum information tasks.

Journal Article Type Article
Publication Date Jun 7, 2017
Journal Physical Review Letters
Print ISSN 0031-9007
Electronic ISSN 1079-7114
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 118
Issue 23
APA6 Citation Deng, X., Xiang, Y., Tian, C., Adesso, G., He, Q., Gong, Q., …Peng, K. (2017). Demonstration of monogamy relations for Einstein-Podolsky-Rosen steering in Gaussian cluster states. Physical Review Letters, 118(23), https://doi.org/10.1103/PhysRevLett.118.230501
DOI https://doi.org/10.1103/PhysRevLett.118.230501
Publisher URL https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.118.230501
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information © 2017 American Physical Society

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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