Fast multi-copy entanglement purification with linear optics

doi:10.1088/1674-1056/24/12/120306

Abstract

We describe an entanglement purification protocol for a polarization Bell state. Different from the previous protocols, it does not require the controlled-not gate, and only uses linear optical elements to complete the task. This protocol requires multi-copy degraded mixed states, which can make this protocol obtain a high fidelity in one purification step. It can also be extended to purify the multi-photon Greenberger-Horne-Zeilinger (GHZ) state. This protocol may be useful in future long-distance communication.

Keywords: quantum computation entanglement purification entanglement

Received: 15 July 2015
Revised: 16 August 2015
Accepted manuscript online:

PACS:	03.67.Hk	(Quantum communication)
	03.65.Ud	(Entanglement and quantum nonlocality)
	03.67.Lx	(Quantum computation architectures and implementations)

Fund:

Project supported by the National Natural Science Foundation of China (Grant Nos. 11474168 and 61401222), the Qing Lan Project of Jiangsu Province, China, the STITP Project in Nanjing University of Posts and Telecommunications, the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20151502), the Natural Science Foundation of the Jiangsu Higher Education Institutions (Grant No. 15KJA120002), and the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions, China.

Corresponding Authors: Sheng Yu-Bo
E-mail: shengyb@njupt.edu.cn

Cite this article:

Cai Chun (蔡春), Zhou Lan (周澜), Sheng Yu-Bo (盛宇波) Fast multi-copy entanglement purification with linear optics 2015 Chin. Phys. B 24 120306

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Fast multi-copy entanglement purification with linear optics

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