One-way Einstein-Podolsky-Rosen Steering

被引：265

作者：

Bowles, Joseph ^{[1
]}

Vertesi, Tamas ^{[2
]}

Quintino, Marco Tulio ^{[1
]}

Brunner, Nicolas ^{[1
,3
]}

机构：

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

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

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

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 112卷 / 20期

基金：

瑞士国家科学基金会; 英国工程与自然科学研究理事会;

关键词：

QUANTUM; NONLOCALITY; PARADOX; STATES;

D O I：

10.1103/PhysRevLett.112.200402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Einstein-Podolsky-Rosen steering is a form of quantum nonlocality exhibiting an inherent asymmetry between the observers, Alice and Bob. A natural question is then whether there exist entangled states which are one-way steerable, that is, Alice can steer Bob's state, but it is impossible for Bob to steer the state of Alice. So far, such a phenomenon has been demonstrated for continuous variable systems, but with a strong restriction on allowed measurements, namely, considering only Gaussian measurements. Here we present a simple class of entangled two-qubit states which are one-way steerable, considering arbitrary projective measurements. This shows that the nonlocal properties of entangled states can be fundamentally asymmetrical.

引用

页数：5

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