Entanglement distribution using three-mode separable state with imperfect equipments

doi:10.1088/1674-1056/20/7/070306

中国物理B ›› 2011, Vol. 20 ›› Issue (7): 70306-070306.doi: 10.1088/1674-1056/20/7/070306

Entanglement distribution using three-mode separable state with imperfect equipments

张劼¹, 宋婷婷², 高飞², 温巧燕²

(1)School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China; (2)State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China

收稿日期:2010-09-26 修回日期:2011-03-03 出版日期:2011-07-15 发布日期:2011-07-15

Entanglement distribution using three-mode separable state with imperfect equipments

Song Ting-Ting(宋婷婷)^a)†, Zhang Jie(张劼)^b), Gao Fei(高飞)^a), and Wen Qiao-Yan(温巧燕)^a)

^a State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China; ^b School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China

Received:2010-09-26 Revised:2011-03-03 Online:2011-07-15 Published:2011-07-15

摘要/Abstract

摘要： We show a scheme to distribute the entanglement by using three-mode separable Gaussian state prepared with imperfect equipments. The scheme achieves the aim that the entanglement is distributed between two distant parties with only Gaussian operations and linear optics elements. Moreover, we analyse the logarithmic negativity of the entanglement shared between the two parties when the systems are imperfect and arrive at the conclusion that the logarithmic negativity is asymptotically stable with fluctuations within a certain space range.

关键词: entanglement distribution, separable state, imperfect equipments

Abstract: We show a scheme to distribute the entanglement by using three-mode separable Gaussian state prepared with imperfect equipments. The scheme achieves the aim that the entanglement is distributed between two distant parties with only Gaussian operations and linear optics elements. Moreover, we analyse the logarithmic negativity of the entanglement shared between the two parties when the systems are imperfect and arrive at the conclusion that the logarithmic negativity is asymptotically stable with fluctuations within a certain space range.

Key words: entanglement distribution, separable state, imperfect equipments

中图分类号: (Entanglement measures, witnesses, and other characterizations)

03.67.Mn

03.65.Ud (Entanglement and quantum nonlocality) 42.50.Dv (Quantum state engineering and measurements)

宋婷婷, 张劼, 高飞, 温巧燕. Entanglement distribution using three-mode separable state with imperfect equipments[J]. 中国物理B, 2011, 20(7): 70306-070306.

Song Ting-Ting(宋婷婷), Zhang Jie(张劼), Gao Fei(高飞), and Wen Qiao-Yan(温巧燕). Entanglement distribution using three-mode separable state with imperfect equipments[J]. Chin. Phys. B, 2011, 20(7): 70306-070306.

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Entanglement distribution using three-mode separable state with imperfect equipments

Entanglement distribution using three-mode separable state with imperfect equipments

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