Einstein-Podolsky-Rosen steering in Gaussian weighted graph states

Wang, Meihong1,2; Deng, Xiaowei1,3,4; Qin, Zhongzhong1,2; Su, Xiaolong1,2

2019-08-22

10.1103/PhysRevA.100.022328

PHYSICAL REVIEW A   影响因子和分区

2469-9926

2469-9934

Einstein-Podolsky-Rosen (EPR) steering, as one of the most intriguing phenomenon of quantum mechanics, is a useful quantum resource for quantum communication. Understanding the type of EPR steering in a graph state is the basis for application of it in a quantum network. In this paper, we present EPR steering in a Gaussian weighted graph state, including a linear tripartite and a four-mode square weighted graph state. The dependence of EPR steering on weight factor in the weighted graph state is analyzed. Gaussian EPR steering between two modes of a weighted graph state is presented, which does not exist in the Gaussian cluster state (where the weight factor is unit). For the four-mode square Gaussian weighted graph state, EPR steering between one and its two nearest modes is also presented, which is absent in the four-mode square Gaussian cluster state. We also show that Gaussian EPR steering in a weighted graph state is also bounded by the Coffman-Kundu-Wootters monogamy relation. The presented results are useful for exploiting EPR steering in a Gaussian weighted graph state as a valuable resource in multiparty quantum communication tasks.

SCI ; EI

英语

其他

program of Youth Sanjin Scholar, National Key R&D Program of China[2016YFA0301402]

Optics ; Physics

Optics ; Physics, Atomic, Molecular & Chemical

WOS:000482209700002

AMER PHYSICAL SOC

20193707428171

Gaussian distribution ; Graphic methods ; Quantum communication

Telecommunication; Radar, Radio and Television:716 ; Probability Theory:922.1 ; Quantum Theory; Quantum Mechanics:931.4

PHYSICS

Web of Science

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.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
4.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China

Wang, Meihong,Deng, Xiaowei,Qin, Zhongzhong,et al. Einstein-Podolsky-Rosen steering in Gaussian weighted graph states[J]. PHYSICAL REVIEW A,2019,100(2).

Wang, Meihong,Deng, Xiaowei,Qin, Zhongzhong,&Su, Xiaolong.(2019).Einstein-Podolsky-Rosen steering in Gaussian weighted graph states.PHYSICAL REVIEW A,100(2).

Wang, Meihong,et al."Einstein-Podolsky-Rosen steering in Gaussian weighted graph states".PHYSICAL REVIEW A 100.2(2019).