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Enhanced phase sensitivity of an SU(1,1) interferometer with displaced squeezed vacuum light

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Abstract

We study the phase sensitivity of an SU(1,1) interferometer with two input beams in the displaced squeezed vacuum state and the coherent state, respectively. We find that there exists an optimal squeezing fraction of the displaced squeezed vacuum state that optimizes the phase sensitivity. We also examine the effects of some factors, including the loss, mean photon number of the input beams and amplitude gain of the optical parameter amplifiers, on the optimal squeezing fraction so that we can choose the optimal values to enhance the phase sensitivity.

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Authors and Affiliations

  1. Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices (SIPSE) & Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, South China Normal University, Guangzhou, 510006, China

    Xiao-Yu Hu  (胡小玉), Chao-Ping Wei  (魏朝平), Ya-Fei Yu  (於亚飞) & Zhi-Ming Zhang  (张智明)

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  1. Xiao-Yu Hu  (胡小玉)
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  2. Chao-Ping Wei  (魏朝平)
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  3. Ya-Fei Yu  (於亚飞)
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  4. Zhi-Ming Zhang  (张智明)
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Correspondence to Ya-Fei Yu  (於亚飞) or Zhi-Ming Zhang  (张智明).

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Hu, XY., Wei, CP., Yu, YF. et al. Enhanced phase sensitivity of an SU(1,1) interferometer with displaced squeezed vacuum light. Front. Phys. 11, 114203 (2016). https://doi.org/10.1007/s11467-015-0547-0

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