Linear optical quantum computation with imperfect entangled photon-pair sources and inefficient non-photon-number-resolving detectors

被引：12

作者：

Gong, Yan-Xiao ^{[1
,2
,3
]}

Zou, Xu-Bo ^{[3
]}

Ralph, Timothy C. ^{[4
,5
]}

Zhu, Shi-Ning ^{[1
,2
]}

Guo, Guang-Can ^{[3
]}

机构：

[1] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China

[2] Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China

[3] Univ Sci & Technol China, CAS, Key Lab Quantum Informat, Hefei 230026, Peoples R China

[4] Univ Queensland, Ctr Quantum Comp Technol, Brisbane, Qld 4072, Australia

[5] Univ Queensland, Dept Phys, Brisbane, Qld 4072, Australia

来源：

PHYSICAL REVIEW A | 2010年 / 81卷 / 05期

基金：

中国国家自然科学基金; 澳大利亚研究理事会;

关键词：

D O I：

10.1103/PhysRevA.81.052303

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We propose a scheme for efficient cluster state quantum computation by using imperfect polarization-entangled photon-pair sources, linear optical elements, and inefficient non-photon-number-resolving detectors. The efficiency threshold for loss tolerance in our scheme requires the product of source and detector efficiencies should be > 1/2, the best known figure. This figure applies to uncorrelated loss. We further find that the loss threshold is unaffected by correlated loss in the photon pair source. Our approach sheds new light on efficient linear optical quantum computation with imperfect experimental conditions.

引用

页数：4

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