Long-distance quantum communication through any number of entanglement-swapping operations

被引：20

作者：

Khalique, Aeysha ^{[1
,2
,3
,4
,5
]}

Sanders, Barry C. ^{[2
,3
,4
,5
,6
,7
]}

机构：

[1] Natl Univ Sci & Technol, Sch Nat Sci, Islamabad, Pakistan

[2] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

[3] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China

[4] Univ Sci & Technol China, Shanghai Branch, CAS Ctr Excellence, Shanghai 201315, Peoples R China

[5] Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Shanghai 201315, Peoples R China

[6] Univ Calgary, Inst Quantum Sci & Technol, Calgary, AB T2N 1N4, Canada

[7] Canadian Inst Adv Res, Program Quantum Informat Sci, Toronto, ON M5G 1Z8, Canada

来源：

PHYSICAL REVIEW A | 2014年 / 90卷 / 03期

关键词：

SECURITY; PHOTONS; RELAY;

D O I：

10.1103/PhysRevA.90.032304

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We develop a theory and accompanying mathematical model for quantum communication via any number of intermediate entanglement-swapping operations and solve numerically for up to three intermediate entanglement-swapping operations. Our model yields two-photon interference visibilities postselected on photon counts at the intermediate entanglement-swapping stations. Realistic experimental conditions are accommodated through the parametric down-conversion rate, photon-counter efficiencies and dark-count rates, and instrument and transmission losses. We calculate achievable quantum communication distances such that two-photon interference visibility exceeds the Bell-inequality threshold.

引用

页数：8

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