Related papers: The effect of Quantum Statistics on the sensitivity in an SU(1,1) interferometer

The effect of Quantum Statistics on the sensitivity in an SU(1,1) interferometer

URL: http://arxiv.org/abs/2308.03002v1
Date: Sun, 6 Aug 2023 03:28:18 GMT
Title: The effect of Quantum Statistics on the sensitivity in an SU(1,1) interferometer
Authors: Jie Zeng, Yingxing Ding, Mengyao Zhou, Gao-Feng Jiao, Keye Zhang, L. Q. Chen, Weiping Zhang, and Chun-Hua Yuan
Abstract summary: We study the effect of quantum statistics of the light field on the quantum enhancement of parameter estimation based on cat state input the SU (1,1) interferometer.
Score: 2.4536764586502358
License: http://creativecommons.org/licenses/by/4.0/
Abstract: We theoretically study the effect of quantum statistics of the light field on the quantum enhancement of parameter estimation based on cat state input the SU(1,1) interferometer. The phase sensitivity is dependent on the relative phase $\theta$ between two coherent states of Schr\"{o}dinger cat states. The optimal sensitivity is achieved when the relative phase is $\pi$% , i.e., odd coherent states input. For a coherent state input into one port, the phase sensitivity of the odd coherent state into the second input port is inferior to that of the squeezed vacuum state input. However, in the presence of losses the Schr\"{o}dinger cat states are more resistant to loss than squeezed vacuum states. As the amplitude of Schr\"{o}dinger cat states increases, the quantum enhancement of phase sensitivity decreases, which shows that the quantum statistics of Schr\"{o}dinger cat states tends towards Poisson statistics from sub-Poisson statistics or super-Poisson statistics.

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