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Enhanced phase sensitivity of an SU(1,1) interferometer with displaced squeezed vacuum light |
Xiao-Yu Hu (胡小玉),Chao-Ping Wei (魏朝平),Ya-Fei Yu (於亚飞)( ),Zhi-Ming Zhang(张智明)() |
| 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 |
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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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| Keywords
phase sensitivity
SU(1,1) interferometer
displaced squeezed vacuum state
optimal squeezing fraction
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Corresponding Author(s):
Ya-Fei Yu (於亚飞),Zhi-Ming Zhang(张智明)
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Online First Date: 06 January 2016
Issue Date: 08 June 2016
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