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

Authors :
Deng, Xiaowei
Xiang, Yu
Tian, Caixing
Adesso, Gerardo
He, Qiongyi
Gong, Qihuang
Su, Xiaolong
Xie, Changde
Peng, Kunchi
Source :
Phys. Rev. Lett. 118, 230501 (2017)
Publication Year :
2017

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-multi-mode steering. Our experiment paves the way for exploiting EPR steering in Gaussian cluster states as a valuable resource for multiparty quantum information tasks.

Subjects

Subjects :
Quantum Physics

Details

Database :
arXiv
Journal :
Phys. Rev. Lett. 118, 230501 (2017)
Publication Type :
Report
Accession number :
edsarx.1702.06287
Document Type :
Working Paper
Full Text :
https://doi.org/10.1103/PhysRevLett.118.230501