2015/11/30 by Kai Sun, Xiang-Jun Ye, Jin-Shi Xu +6 · 206 citations
Medicine · Physics and Astronomy · #Biofield Effects and Biophysics #EPR paradox #Einstein #Physics #Quantum #Quantum Mechanics and Applications #Quantum chaos and dynamical systems #Quantum entanglement #Quantum mechanics #quant-ph
paper · pdf · doi:10.1103/physrevlett.116.160404
published in Physical Review Letters 116(16), 160404 (American Physical Society) · 12 pages, 12 figures
openalex publication_date 2016/04/21 · arxiv created 2016/04/22 · arxiv updated 2016/04/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Einstein-Podolsky-Rosen (EPR) steering describes the ability of one observer to nonlocally "steer" the other observer's state through local measurements. EPR steering exhibits a unique asymmetric property; i.e., the steerability can differ between observers, which can lead to one-way EPR steering in which only one observer obtains steerability in the steering process. This property is inherently different from the symmetric concepts of entanglement and Bell nonlocality, and it has attracted increasing interest. Here, we experimentally demonstrate asymmetric EPR steering for a class of two-qubit states in the case of two measurement settings. We propose a practical method to quantify the steerability. We then provide a necessary and sufficient condition for EPR steering and clearly demonstrate one-way EPR steering. Our work provides new insight into the fundamental asymmetry of quantum nonlocality and has potential applications in asymmetric quantum information processing.