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  • Letter

Efficient tomography of coherent optical detectors

Xinyu Chen, Feixiang Xu, Huichao Xu, and Lijian Zhang*

  • National Laboratory of Solid State Microstructures and College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China and Collaborative Innovation Center of Advanced Microstructures Nanjing University, Nanjing 210093, China

  • *Corresponding author: lijian.zhang@nju.edu.cn
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Phys. Rev. A 106, L051702 – Published 30 November, 2022

DOI: https://doi.org/10.1103/PhysRevA.106.L051702

Abstract

We propose an efficient tomography method to address the reconstruction complexity of any general quantum coherent-optical detectors. By extracting the linear loss from the entire detection system, we obtain the effective positive-operator-valued measure in matrix representations with a much smaller size. We apply this method to reconstruct a typical coherent detector: the weak-field homodyne detector. The method also highlights the effects of linear loss on nonclassical features of coherent optical detectors.

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Phys. Rev. A 106, L051702– Published 30 November, 2022
  • Received 14 August 2022
  • Accepted 16 November 2022
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