中国物理B ›› 2017, Vol. 26 ›› Issue (9): 94204-094204.doi: 10.1088/1674-1056/26/9/094204

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

Super-resolution and super-sensitivity of entangled squeezed vacuum state using optimal detection strategy

Jiandong Zhang(张建东), Zijing Zhang(张子静), Longzhu Cen(岑龙柱), Shuo Li(李硕), Yuan Zhao(赵远), Feng Wang(王峰)   

  1. 1 Harbin Institute of Technology, Harbin 150001, China;
    2 Tianjin Jinhang Institute of Technology, Tianjin 300192, China
  • 收稿日期:2017-03-16 修回日期:2017-05-02 出版日期:2017-09-05 发布日期:2017-09-05
  • 通讯作者: Zijing Zhang, Yuan Zhao E-mail:zhangzijing@hit.edu.cn;zhaoyuan@hit.edu.cn

Super-resolution and super-sensitivity of entangled squeezed vacuum state using optimal detection strategy

Jiandong Zhang(张建东)1, Zijing Zhang(张子静)1, Longzhu Cen(岑龙柱)1, Shuo Li(李硕)1, Yuan Zhao(赵远)1, Feng Wang(王峰)2   

  1. 1 Harbin Institute of Technology, Harbin 150001, China;
    2 Tianjin Jinhang Institute of Technology, Tianjin 300192, China
  • Received:2017-03-16 Revised:2017-05-02 Online:2017-09-05 Published:2017-09-05
  • Contact: Zijing Zhang, Yuan Zhao E-mail:zhangzijing@hit.edu.cn;zhaoyuan@hit.edu.cn

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摘要： Interference metrology is a method for achieving high precision detection by phase estimation. The phase sensitivity of a traditional interferometer is subject to the standard quantum limit, while its resolution is constrained by the Rayleigh diffraction limit. The resolution and sensitivity of phase measurement can be enhanced by using quantum metrology. We propose a quantum interference metrology scheme using the entangled squeezed vacuum state, which is obtained using the magic beam splitter, expressed as |ψ > = (|ξ>|0 > + ≤ |0 > ≤|ξ>)/√2+2/coshr, such as the N00N state. We derive the phase sensitivity and the resolution of the system with Z detection, project detection, and parity detection. By simulation and analysis, we determine that parity detection is an optimal detection method, which can break through the Rayleigh diffraction limit and the standard quantum limit.

关键词: entangled squeezed vacuum state, quantum metrology, parity detection

Abstract: Interference metrology is a method for achieving high precision detection by phase estimation. The phase sensitivity of a traditional interferometer is subject to the standard quantum limit, while its resolution is constrained by the Rayleigh diffraction limit. The resolution and sensitivity of phase measurement can be enhanced by using quantum metrology. We propose a quantum interference metrology scheme using the entangled squeezed vacuum state, which is obtained using the magic beam splitter, expressed as |ψ > = (|ξ>|0 > + ≤ |0 > ≤|ξ>)/√2+2/coshr, such as the N00N state. We derive the phase sensitivity and the resolution of the system with Z detection, project detection, and parity detection. By simulation and analysis, we determine that parity detection is an optimal detection method, which can break through the Rayleigh diffraction limit and the standard quantum limit.

Key words: entangled squeezed vacuum state, quantum metrology, parity detection

中图分类号:  (Quantum optics)

  • 42.50.-p
42.50.St (Nonclassical interferometry, subwavelength lithography) 42.50.Tx (Optical angular momentum and its quantum aspects)