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

被引：372

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：

中国国家自然科学基金; 北京市自然科学基金;

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.

引用

页数：7

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