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

Deng, Xiaowei and Xiang, Yu and Tian, Caixing and Adesso, Gerardo and He, Qiongyi and Gong, Qihuang and Su, Xiaolong and Xie, Changde and Peng, Kunchi (2017) Demonstration of monogamy relations for Einstein-Podolsky-Rosen steering in Gaussian cluster states. Physical Review Letters, 118 (23). ISSN 1079-7114

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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.

Item Type: Article
Additional Information: © 2017 American Physical Society
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Mathematical Sciences
Identification Number: 10.1103/PhysRevLett.118.230501
Depositing User: Eprints, Support
Date Deposited: 14 Jun 2017 10:34
Last Modified: 14 Jun 2017 20:59
URI: http://eprints.nottingham.ac.uk/id/eprint/43570

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