中国物理B ›› 2016, Vol. 25 ›› Issue (10): 104203-104203.doi: 10.1088/1674-1056/25/10/104203

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Quantum metrology with two-mode squeezed thermal state: Parity detection and phase sensitivity

Heng-Mei Li(李恒梅), Xue-Xiang Xu(徐学翔), Hong-Chun Yuan(袁洪春), Zhen Wang(王震)   

  1. 1 College of Mathematical Physics and Chemical Engineering, Changzhou Institute of Technology, Changzhou 213002, China;
    2 College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, China;
    3 College of Electrical and Optoelectronic Engineering, Changzhou Institute of Technology, Changzhou 213002, China;
    4 Changzhou Institute of Modern Optoelectronic Technology, Changzhou 213002, China
  • 收稿日期:2016-03-20 修回日期:2016-05-12 出版日期:2016-10-05 发布日期:2016-10-05
  • 通讯作者: Heng-Mei Li E-mail:lihengm@ustc.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11447002), the Research Foundation of the Education Department of Jiangxi Province of China (Grant No. GJJ150338), and the Research Foundation for Changzhou Institute of Modern Optoelectronic Technology (Grant No. CZGY15).

Quantum metrology with two-mode squeezed thermal state: Parity detection and phase sensitivity

Heng-Mei Li(李恒梅)1, Xue-Xiang Xu(徐学翔)2, Hong-Chun Yuan(袁洪春)3,4, Zhen Wang(王震)1   

  1. 1 College of Mathematical Physics and Chemical Engineering, Changzhou Institute of Technology, Changzhou 213002, China;
    2 College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, China;
    3 College of Electrical and Optoelectronic Engineering, Changzhou Institute of Technology, Changzhou 213002, China;
    4 Changzhou Institute of Modern Optoelectronic Technology, Changzhou 213002, China
  • Received:2016-03-20 Revised:2016-05-12 Online:2016-10-05 Published:2016-10-05
  • Contact: Heng-Mei Li E-mail:lihengm@ustc.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11447002), the Research Foundation of the Education Department of Jiangxi Province of China (Grant No. GJJ150338), and the Research Foundation for Changzhou Institute of Modern Optoelectronic Technology (Grant No. CZGY15).

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摘要： Based on the Wigner-function method, we investigate the parity detection and phase sensitivity in a Mach-Zehnder interferometer (MZI) with two-mode squeezed thermal state (TMSTS). Using the classical transformation relation of the MZI, we derive the input-output Wigner functions and then obtain the explicit expressions of parity and phase sensitivity. The results from the numerical calculation show that supersensitivity can be reached only if the input TMSTS have a large number photons.

关键词: Mach-Zenhder interferometer, two-mode squeezed thermal state, Wigner function, phase sensitivity

Abstract: Based on the Wigner-function method, we investigate the parity detection and phase sensitivity in a Mach-Zehnder interferometer (MZI) with two-mode squeezed thermal state (TMSTS). Using the classical transformation relation of the MZI, we derive the input-output Wigner functions and then obtain the explicit expressions of parity and phase sensitivity. The results from the numerical calculation show that supersensitivity can be reached only if the input TMSTS have a large number photons.

Key words: Mach-Zenhder interferometer, two-mode squeezed thermal state, Wigner function, phase sensitivity

中图分类号:  (Nonclassical interferometry, subwavelength lithography)

  • 42.50.St
42.50.Dv (Quantum state engineering and measurements) 42.50.Lc (Quantum fluctuations, quantum noise, and quantum jumps)