Device-independent characterization of entanglement based on bell nonlocality  

作　　者：Geng Chen Wen-Hao Zhang Peng Yin Chuan-Feng Li Guang-Can Guo 

机构地区：[1]CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei,Anhui 230026,China [2]CAS Center For Excellence in Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei,Anhui 230026,China

出　　处：《Fundamental Research》2021年第1期27-42,共16页自然科学基础研究（英文版）

基　　金：This work was supported by the National Key Research and Devel-opment Program of China(Nos.2016YFA0302700,2017YFA0304100);National Natural Science Foundation of China(Grant Nos.11874344,61835004,11774335,91536219,11821404);Key Research Program of Frontier Sciences,CAS(No.QYZDY-SSW-SLH003);Anhui Initiative in Quantum Information Technologies(AHY020100,AHY060300);the Fundamental Research Funds for the Central Universities(Grant no.WK2030020019,WK2470000026);Science Foundation of the CAS(No.ZDRW-XH-2019-1).

摘　　要：Quantum entanglement,has been acknowledged as a precious resource due to its inherent nonclassical correla-tions between subsystems.These quantum correlations have the potential for many quantum processes,includ-ing canonical ones:quantum cryptography,quantum teleportation,and dense coding.To exploit the advantages of quantum entanglement,two essential premises are required,i.e.,to prepare high-quality entanglement and characterize quality level of prepared entanglement.Thus far,quantum entanglement can be produced in various quantum systems;however,it appears that this new resource is complex and difficult to characterize.The standard methods to characterize multipartite entanglement,e.g.,entanglement witness,state tomography,or quantum state verification,require full knowledge of the Hilbert space dimension and precise calibration of measurement devices,which are usually difficult to acquire in experiment.The most radical way to overcome these problems is to detect entanglement solely based on the Bell-like correlations of measurement outcomes collected in the exper-iment,namely,device-independent characterization of entanglement.This article reviews the recently developed device-independent methods to characterize entanglement,including self-testing and device-independent certi-fication of entanglement.These approaches can be widely applied in kinds of quantum information processing,especially for those with security demands.

关 键 词：Quantum entanglement Device-independent characterization SELF-TESTING Quantum nonlocality 

分 类 号：O413[理学—理论物理]