All quantum states useful for teleportation are nonlocal resources

被引：64

作者：

Cavalcanti, Daniel ^{[1
]}

Acin, Antonio ^{[2
,3
]}

Brunner, Nicolas ^{[4
,5
]}

Vertesi, Tamas ^{[6
]}

机构：

[1] Natl Univ Singapore, Ctr Quantum Technol, Singapore 117542, Singapore

[2] Inst Ciencies Foton, Castelldefels 08860, Barcelona, Spain

[3] Inst Catalana Recerca & Estudis Avancats, Barcelona 08010, Spain

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

[5] Univ Geneva, Dept Phys Theor, CH-1211 Geneva, Switzerland

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

来源：

PHYSICAL REVIEW A | 2013年 / 87卷 / 04期

基金：

英国工程与自然科学研究理事会; 新加坡国家研究基金会; 瑞士国家科学基金会;

关键词：

BELLS INEQUALITIES; ENTANGLEMENT;

D O I：

10.1103/PhysRevA.87.042104

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Understanding the relation between the different forms of inseparability in quantum mechanics is a longstanding problem in the foundations of quantum theory and has implications for quantum information processing. Here we make progress in this direction by establishing a direct link between quantum teleportation and Bell nonlocality. In particular, we show that all entangled states which are useful for teleportation are nonlocal resources, i.e., lead to deterministic violation of Bell's inequality. Our result also extends the phenomenon of superactivation of quantum nonlocality, recently proven by C. Palazuelos [Phys. Rev. Lett. 109, 190401 (2012)], and suggests that the latter might in fact be more general than initially thought. DOI: 10.1103/PhysRevA.87.042104

引用

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