Experimental Self-Characterization of Quantum Measurements

Zhang, Aonan1,2; Xie, Jie1,2; Xu, Huichao1,2; Zheng, Kaimin1,2; Zhang, Han1,2; Poon, Yiu-Tung3,4,5; Vedral, Vlatko6,7; Zhang, Lijian1,2

2020

10.1103/PhysRevLett.124.040402

Physical Review Letters   影响因子和分区

10797114

1079-7114

The accurate and reliable description of measurement devices is a central problem in both observing uniquely nonclassical behaviors and realizing quantum technologies from powerful computing to precision metrology. To date quantum tomography is the prevalent tool to characterize quantum detectors. However, such a characterization relies on accurately characterized probe states, rendering reliability of the characterization lost in circular argument. Here we report a self-characterization method of quantum measurements based on reconstructing the response range - the entirety of attainable measurement outcomes, eliminating the reliance on known states. We characterize two representative measurements implemented with photonic setups and obtain fidelities above 99.99% with the conventional tomographic reconstructions. This initiates range-based techniques in characterizing quantum systems and foreshadows novel device-independent protocols of quantum information applications.
© 2020 American Physical Society.

SCI ; EI

英语

NI论文

其他

National Natural Science Foundation of China[91836303] ; National Natural Science Foundation of China[61975077] ; National Natural Science Foundation of China[61490711] ; National Natural Science Foundation of China[11690032]

Physics

Physics, Multidisciplinary

WOS:000509665900001

American Physical Society

20201008259948

Tomography

Light/Optics:741.1 ; Imaging Techniques:746

PHYSICS

Web of Science

1.National Laboratory of Solid State Microstructures, Key Laboratory of Intelligent Optical Sensing and Manipulation (Ministry of Education), College of Engineering and Applied Sciences, School of Physics, Nanjing University, Nanjing; 210093, China
2.Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing; 210093, China
3.Department of Mathematics, Iowa State University, Ames; IA; 50011, United States
4.Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen; 518055, China
5.Center for Quantum Computing, Peng Cheng Laboratory, Shenzhen; 518055, China
6.Atomic and Laser Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford; OX13PU, United Kingdom
7.Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, Singapore; 117543, Singapore

Zhang, Aonan,Xie, Jie,Xu, Huichao,et al. Experimental Self-Characterization of Quantum Measurements[J]. Physical Review Letters,2020,124(4).

Zhang, Aonan.,Xie, Jie.,Xu, Huichao.,Zheng, Kaimin.,Zhang, Han.,...&Zhang, Lijian.(2020).Experimental Self-Characterization of Quantum Measurements.Physical Review Letters,124(4).

Zhang, Aonan,et al."Experimental Self-Characterization of Quantum Measurements".Physical Review Letters 124.4(2020).