Journal of East China Normal University(Natural Science) >

2022 , Vol. 2022 >Issue 2: 135 - 142

DOI: https://doi.org/10.3969/j.issn.1000-5641.2022.02.016

Physics and Electronics

Limit of multi-parameter phase estimation in an actively correlated Mach-Zehnder interferometer

  • WANG Qiang ,
  • ZENG Jie ,
  • JIAO Gaofeng ,
  • YUAN Chunhua
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  • School of Physics and Electronic Science, East China Normal University, Shanghai　200241, China

Received date: 2021-04-13

  Accepted date: 2021-11-26

  Online published: 2022-03-28

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Abstract

In this paper, the phase estimation limits of an active-related Mach-Zehnder interferometer with three port inputs and two different input states was studied using quantum Fisher information and quantum Fisher information matrix theory. In the case of an arbitrary light field input to a single port, the effect of the input field fluctuation on the limit of phase estimation is eliminated by the theory of phase averaging and the quantum Fischer information matrix. In the case of a dual port input coherent state, the effect of the fluctuating light field on the estimation limit cannot be eliminated, and the phase estimation limit depends on the initial phase of the two input coherent states.

Key words： actively correlated Mach-Zehnder interferometer; quantum Fisher information matrix; phase estimation; nonlinear beam splitter

Cite this article

WANG Qiang , ZENG Jie , JIAO Gaofeng , YUAN Chunhua . Limit of multi-parameter phase estimation in an actively correlated Mach-Zehnder interferometer[J]. Journal of East China Normal University(Natural Science), 2022 , 2022(2) : 135 -142 . DOI: 10.3969/j.issn.1000-5641.2022.02.016

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