中国物理B ›› 2013, Vol. 22 ›› Issue (11): 110601-110601.doi: 10.1088/1674-1056/22/11/110601

所属专题: TOPICAL REVIEW — Quantum information

• TOPICAL REVIEW—Quantum information • 上一篇    下一篇

Quantum metrology

项国勇, 郭光灿   

  1. Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
  • 收稿日期:2013-09-30 出版日期:2013-09-28 发布日期:2013-09-28
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant Nos. 2011CBA00200 and 2011CB9211200), the National Natural Science Foundation of China (Grant Nos. 61108009 and 61222504), the Anhui Provincial Natural Science Foundation, China (Grant No. 1208085QA08), and the Ph. D. Program Foundation of Ministry of Education of China (Grant No. 20113402120017).

Quantum metrology

Xiang Guo-Yong (项国勇), Guo Guang-Can (郭光灿)   

  1. Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
  • Received:2013-09-30 Online:2013-09-28 Published:2013-09-28
  • Contact: Guo Guang-Can E-mail:gcguo@ustc.edu.cn
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant Nos. 2011CBA00200 and 2011CB9211200), the National Natural Science Foundation of China (Grant Nos. 61108009 and 61222504), the Anhui Provincial Natural Science Foundation, China (Grant No. 1208085QA08), and the Ph. D. Program Foundation of Ministry of Education of China (Grant No. 20113402120017).

摘要: The statistical error is ineluctable in any measurement. Quantum techniques, especially with the development of quantum information, can help us squeeze the statistical error and enhance the precision of measurement. In a quantum system, there are some quantum parameters, such as the quantum state, quantum operator, and quantum dimension, which have no classical counterparts. So quantum metrology deals with not only the traditional parameters, but also the quantum parameters. Quantum metrology includes two important parts: measuring the physical parameters with a precision beating the classical physics limit and measuring the quantum parameters precisely. In this review, we will introduce how quantum characters (e.g., squeezed state and quantum entanglement) yield a higher precision, what the research areas are scientists most interesting in, and what the development status of quantum metrology and its perspectives are.

关键词: quantum entangled state, phase estimation, quantum imaging, quantum tomography

Abstract: The statistical error is ineluctable in any measurement. Quantum techniques, especially with the development of quantum information, can help us squeeze the statistical error and enhance the precision of measurement. In a quantum system, there are some quantum parameters, such as the quantum state, quantum operator, and quantum dimension, which have no classical counterparts. So quantum metrology deals with not only the traditional parameters, but also the quantum parameters. Quantum metrology includes two important parts: measuring the physical parameters with a precision beating the classical physics limit and measuring the quantum parameters precisely. In this review, we will introduce how quantum characters (e.g., squeezed state and quantum entanglement) yield a higher precision, what the research areas are scientists most interesting in, and what the development status of quantum metrology and its perspectives are.

Key words: quantum entangled state, phase estimation, quantum imaging, quantum tomography

中图分类号:  (Metrology)

  • 06.20.-f
42.25.Hz (Interference) 42.50.Dv (Quantum state engineering and measurements) 42.65.Lm (Parametric down conversion and production of entangled photons)