Observation of Genuine One-Way Einstein-Podolsky-Rosen Steering

被引：197
作者：
Wollmann, Sabine [1 ,2 ]
Walk, Nathan [1 ,2 ,3 ]
Bennet, Adam J. [1 ,2 ]
Wiseman, Howard M. [1 ,2 ]
Pryde, Geoff J. [1 ,2 ]
机构：
[1] Griffith Univ, Ctr Quantum Computat & Commun Technol, Brisbane, Qld 4111, Australia
[2] Griffith Univ, Ctr Quantum Dynam, Brisbane, Qld 4111, Australia
[3] Univ Oxford, Dept Comp Sci, Oxford OX1 3QD, England
来源：
PHYSICAL REVIEW LETTERS | 2016年 / 116卷 / 16期
基金：
英国工程与自然科学研究理事会;
关键词：
NONDEGENERATE PARAMETRIC AMPLIFICATION; BELL INEQUALITY; STATES; PARADOX;
D O I：
10.1103/PhysRevLett.116.160403
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Within the hierarchy of inseparable quantum correlations, Einstein-Podolsky-Rosen steering is distinguished from both entanglement and Bell nonlocality by its asymmetry-there exist conditions where the steering phenomenon changes from being observable to not observable, simply by exchanging the role of the two measuring parties. While this one-way steering feature has been previously demonstrated for the restricted class of Gaussian measurements, for the general case of positive-operator-valued measures even its theoretical existence has only recently been settled. Here, we prove, and then experimentally observe, the one-way steerability of an experimentally practical class of entangled states in this general setting. As well as its foundational significance, the demonstration of fundamentally asymmetric nonlocality also has practical implications for the distribution of the trust in quantum communication networks.
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页数：6
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