中国物理B ›› 2020, Vol. 29 ›› Issue (9): 90302-090302.doi: 10.1088/1674-1056/ab9f23

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Effects of postselected von Neumann measurement on the properties of single-mode radiation fields

Yusuf Turek(玉素甫·吐拉克)   

  1. School of Physics and Electronic Engineering, Xinjiang Normal University, Urumqi 830054, China
  • 收稿日期:2020-04-29 修回日期:2020-05-20 接受日期:2020-06-23 出版日期:2020-09-05 发布日期:2020-09-05
  • 通讯作者: Yusuf Turek E-mail:yusufu1984@hotmail.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11865017) and the Introduction Program of High-Level Talents of Xinjiang Ministry of Science, China.

Effects of postselected von Neumann measurement on the properties of single-mode radiation fields

Yusuf Turek(玉素甫·吐拉克)   

  1. School of Physics and Electronic Engineering, Xinjiang Normal University, Urumqi 830054, China
  • Received:2020-04-29 Revised:2020-05-20 Accepted:2020-06-23 Online:2020-09-05 Published:2020-09-05
  • Contact: Yusuf Turek E-mail:yusufu1984@hotmail.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11865017) and the Introduction Program of High-Level Talents of Xinjiang Ministry of Science, China.

摘要: Postselected von Neumann measurement characterized by postselection and weak value has been found to possess potential applications in quantum metrology and solved plenty of fundamental problems in quantum theory. As an application of this new measurement technique in quantum optics and quantum information processing, its effects on the features of single-mode radiation fields such as coherent state, squeezed vacuum state and Schrödinger cat sate are investigated by considering full-order effects of unitary evolution. The results show that the conditional probabilities of finding photons, second-order correlation functions, Qm-factors and squeezing effects of those states after the postselected measurement is significantly changed are comparable with the corresponding initial pointer states.

关键词: radiation field, postselection, weak value, statistical properties, squeezing parameter

Abstract: Postselected von Neumann measurement characterized by postselection and weak value has been found to possess potential applications in quantum metrology and solved plenty of fundamental problems in quantum theory. As an application of this new measurement technique in quantum optics and quantum information processing, its effects on the features of single-mode radiation fields such as coherent state, squeezed vacuum state and Schrödinger cat sate are investigated by considering full-order effects of unitary evolution. The results show that the conditional probabilities of finding photons, second-order correlation functions, Qm-factors and squeezing effects of those states after the postselected measurement is significantly changed are comparable with the corresponding initial pointer states.

Key words: radiation field, postselection, weak value, statistical properties, squeezing parameter

中图分类号:  (Quantum mechanics)

  • 03.65.-w
42.50.-p (Quantum optics) 03.65.Ta (Foundations of quantum mechanics; measurement theory)