Einstein-Podolsky-Rosen-steering swapping between two Gaussian multipartite entangled states

被引：20

作者：

Wang, Meihong ^{[1
]}

Qin, Zhongzhong ^{[1
,2
]}

Wang, Yu ^{[3
]}

Su, Xiaolong ^{[1
,2
]}

机构：

[1] Shanxi Univ, Inst Optoelect, State Key Lab Quantum Opt & Quantum Opt Devices, Taiyuan 030006, Shanxi, Peoples R China

[2] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China

[3] State Key Lab Cryptol, Beijing 100878, Peoples R China

来源：

PHYSICAL REVIEW A | 2017年 / 96卷 / 02期

关键词：

PROBABILITY RELATIONS; QUANTUM;

D O I：

10.1103/PhysRevA.96.022307

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Multipartite Einstein-Podolsky-Rosen (EPR) steering is a useful quantum resource for quantum communication in quantum networks. It has potential applications in secure quantum communication, such as one-sided device-independent quantum key distribution and quantum secret sharing. By distributing optical modes of a multipartite entangled state to space-separated quantum nodes, a local quantum network can be established. Based on the existing multipartite EPR steering in a local quantum network, secure quantum communication protocol can be accomplished. In this manuscript, we present swapping schemes for EPR steering between two space-separated Gaussian multipartite entangled states, which can be used to connect two space-separated quantum networks. Two swapping schemes, including the swapping between a tripartite Greenberger-Horne-Zeilinger (GHZ) entangled state and an EPR entangled state and that between two tripartite GHZ entangled states, are analyzed. Various types of EPR steering are presented after the swapping of two space-separated independent multipartite entanglement states without direct interaction, which can be used to implement quantum communication between two quantum networks. The presented schemes provide technical reference for more complicated quantum networks with EPR steering.

引用

页数：8

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