Deterministic entanglement purification and complete nonlocal Bell-state analysis with hyperentanglement

被引：368
作者：
Sheng, Yu-Bo [1 ,2 ,3 ]
Deng, Fu-Guo [1 ]
机构：
[1] Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China
[2] Beijing Normal Univ, Coll Nucl Sci & Technol, Beijing 100875, Peoples R China
[3] Beijing Normal Univ, Minist Educ, Key Lab Beam Technol & Mat Modificat, Beijing 100875, Peoples R China
来源：
PHYSICAL REVIEW A | 2010年 / 81卷 / 03期
基金：
北京市自然科学基金; 中国国家自然科学基金;
关键词：
QUANTUM CRYPTOGRAPHY; COMMUNICATION;
D O I：
10.1103/PhysRevA.81.032307
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Entanglement purification is a very important element for long-distance quantum communication. Different from all the existing entanglement purification protocols (EPPs) in which two parties can only obtain some quantum systems in a mixed entangled state with a higher fidelity probabilistically by consuming quantum resources exponentially, here we present a deterministic EPP with hyperentanglement. Using this protocol, the two parties can, in principle, obtain deterministically maximally entangled pure states in polarization without destroying any less-entangled photon pair, which will improve the efficiency of long-distance quantum communication exponentially. Meanwhile, it will be shown that this EPP can be used to complete nonlocal Bell-state analysis perfectly. We also discuss this EPP in a practical transmission.
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页数：7
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