Tripartite continuous-variable entanglement of NOPA system

doi:10.1088/1674-1056/27/8/084204

中国物理B ›› 2018, Vol. 27 ›› Issue (8): 84204-084204.doi: 10.1088/1674-1056/27/8/084204

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Tripartite continuous-variable entanglement of NOPA system

Chao-Ying Zhao(赵超樱), Cheng-Mei Zhang(张成梅)

1 College of Science, Hangzhou Dianzi University, Hangzhou 310018, China;
2 State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China;
3 Nokia Solutions and Networks, Hangzhou 310053, China

收稿日期:2017-12-12 修回日期:2018-03-07 出版日期:2018-08-05 发布日期:2018-08-05
通讯作者: Chao-Ying Zhao E-mail:zchy49@hdu.edu.cn
基金资助:
Projected supported by the National Natural Science Foundation of China (Grant No. 11504074) and the Science Fund from the State Key Laboratory of Quantum Optics and Quantum Optics Devices, Shanxi University, Shanxi, China (Grant No. KF201601).

Tripartite continuous-variable entanglement of NOPA system

Chao-Ying Zhao(赵超樱)^1,2, Cheng-Mei Zhang(张成梅)³

1 College of Science, Hangzhou Dianzi University, Hangzhou 310018, China;
2 State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China;
3 Nokia Solutions and Networks, Hangzhou 310053, China

Received:2017-12-12 Revised:2018-03-07 Online:2018-08-05 Published:2018-08-05
Contact: Chao-Ying Zhao E-mail:zchy49@hdu.edu.cn
Supported by:
Projected supported by the National Natural Science Foundation of China (Grant No. 11504074) and the Science Fund from the State Key Laboratory of Quantum Optics and Quantum Optics Devices, Shanxi University, Shanxi, China (Grant No. KF201601).

摘要/Abstract

摘要： We investigate the fundamental limits to the achievable tripartite continuous-variable (CV) entanglement criterion of a generalized V₁ criterion. Our numerical simulation results show that the non-degenerate eigenvalues do effect the performances of the estimated minimum variances. From below the threshold to above the threshold, with the increase of the pump parameter, the tripartite CV entanglement gradually disappears. The different off-diagonal elements seriously distort the weights for entanglement. We can obtain a good tripartite CV entanglement by appropriately controlling the values of off-diagonal elements ε_ij.

关键词: continuous-variable entanglement, generalized V₁ criterion, non-degenerate eigenvalues

Abstract: We investigate the fundamental limits to the achievable tripartite continuous-variable (CV) entanglement criterion of a generalized V₁ criterion. Our numerical simulation results show that the non-degenerate eigenvalues do effect the performances of the estimated minimum variances. From below the threshold to above the threshold, with the increase of the pump parameter, the tripartite CV entanglement gradually disappears. The different off-diagonal elements seriously distort the weights for entanglement. We can obtain a good tripartite CV entanglement by appropriately controlling the values of off-diagonal elements ε_ij.

Key words: continuous-variable entanglement, generalized V₁ criterion, non-degenerate eigenvalues

中图分类号: (Quantum fluctuations, quantum noise, and quantum jumps)

42.50.Lc

42.65.Lm (Parametric down conversion and production of entangled photons)

赵超樱, 张成梅. Tripartite continuous-variable entanglement of NOPA system[J]. 中国物理B, 2018, 27(8): 84204-084204.

Chao-Ying Zhao(赵超樱), Cheng-Mei Zhang(张成梅). Tripartite continuous-variable entanglement of NOPA system[J]. Chin. Phys. B, 2018, 27(8): 84204-084204.

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Tripartite continuous-variable entanglement of NOPA system

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