Closing the Detection Loophole in Bell Experiments Using Qudits

被引：209

作者：

Vertesi, Tamas ^{[1
]}

Pironio, Stefano ^{[2
]}

Brunner, Nicolas ^{[3
]}

机构：

[1] Hungarian Acad Sci, Inst Nucl Res, H-4001 Debrecen, Hungary

[2] Univ Geneva, Appl Phys Grp, CH-1211 Geneva 4, Switzerland

[3] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 06期

基金：

英国工程与自然科学研究理事会;

关键词：

INEQUALITY; PHOTONS;

D O I：

10.1103/PhysRevLett.104.060401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that the detection efficiencies required for closing the detection loophole in Bell tests can be significantly lowered using quantum systems of dimension larger than two. We introduce a series of asymmetric Bell tests for which an efficiency arbitrarily close to 1/N can be tolerated using N-dimensional systems, and a symmetric Bell test for which the efficiency can be lowered down to 61.8% using four-dimensional systems. Experimental perspectives for our schemes look promising considering recent progress in atom-photon entanglement and in photon hyperentanglement.

引用

页数：4

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