Complete hyperentangled-Bell-state analysis for quantum communication

被引：349

作者：

Sheng, Yu-Bo ^{[1
,2
,3
]}

Deng, Fu-Guo ^{[2
]}

Long, Gui Lu ^{[1
,4
,5
]}

机构：

[1] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China

[2] Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China

[3] Beijing Normal Univ, Coll Nucl Sci & Technol, Beijing 100875, Peoples R China

[4] Tsinghua Univ, Ctr Atom & Mol NanoSci, Beijing 100084, Peoples R China

[5] Key Lab Quantum Informat & Measurements, Beijing 100084, Peoples R China

来源：

PHYSICAL REVIEW A | 2010年 / 82卷 / 03期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

ENTANGLEMENT; TELEPORTATION; CRYPTOGRAPHY; REPEATERS; PHOTONS;

D O I：

10.1103/PhysRevA.82.032318

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

It is impossible to unambiguously distinguish the four Bell states in polarization, resorting to linear optical elements only. Recently, the hyperentangled Bell state, the simultaneous entanglement in more than one degree of freedom, has been used to assist in the complete Bell-state analysis of the four Bell states. However, if the additional degree of freedom is qubitlike, one can only distinguish 7 from the group of 16 states. Here we present a way to distinguish the hyperentangled Bell states completely with the help of cross-Kerr nonlinearity. Also, we discuss its application in the quantum teleportation of a particle in an unknown state in two different degrees of freedom and in the entanglement swapping of hyperentangled states. These applications will increase the channel capacity of long-distance quantum communication.

引用

页数：8

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