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Quantum phase estimation with local amplified 1001 state based on Wigner-function method

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Abstract

We demonstrate the utility of Wigner-function (WF) method in studying the quantum phase estimation. This phase estimation protocol for optical interferometry uses local amplified 1001 state as a probe state. Here, the probe state is obtained by local squeezing each mode of a single-photon-path-entangled state (1001 state). We derive analytically the WFs in describing the connection between input and output fields. In addition, the phase estimation is examined by using parity detection, and the results indicate that our strategy is super-resolving and supersensitive.

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Authors and Affiliations

  1. Key Laboratory of Optoelectronic and Telecommunication of Jiangxi Province, Jiangxi Normal University, Nanchang, 330022, China

    Xue-Xiang Xu

  2. College of Optoelectronic Engineering, Changzhou Institute of Technology, Changzhou, 213002, China

    Hong-Chun Yuan

Authors
  1. Xue-Xiang Xu
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  2. Hong-Chun Yuan
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Correspondence to Xue-Xiang Xu.

Additional information

Project supported by the National Natural Science Foundation of China (No. 11264018) and the Natural Science Foundation of Jiangxi Province of China (No. 20142BAB202001).

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Xu, XX., Yuan, HC. Quantum phase estimation with local amplified 1001 state based on Wigner-function method. Quantum Inf Process 14, 411–424 (2015). https://doi.org/10.1007/s11128-014-0854-3

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  • DOI: https://doi.org/10.1007/s11128-014-0854-3

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