Phase-modulated quadrature squeezing in two coupled cavities containing a two-level system

doi:10.1088/1674-1056/ab820a

Abstract The phase-modulated quadrature squeezing in the system that composed of two coupled cavities interacting with a two-level atom is investigated. The variances of the amplitude and phase quadrature of the output field are calculated. It turns out that the squeezing behaviors of the output field can be obviously modified due to the phase difference of the coupling strengths between the atom and the two cavities. The squeezing in one quadrature (i.e., phase quadrature) can be transferred into another (i.e., amplitude quadrature), or the quadrature squeezing located at the low-frequency region can be transferred into the high-frequency region by modulating the relative phase of the coupling strengths. Furthermore, the effects of the decay mismatch between the two cavities and the coupling mismatch between the atom and the cavities on the quadrature squeezing have been discussed. The results show that both the decay mismatch and the coupling mismatch play a positive role in generating better quadrature squeezing.

Keywords: quadrature squeezing cavity QED phase modulation

Received: 14 January 2020
Revised: 03 March 2020
Accepted manuscript online:

PACS:	03.67.-a	(Quantum information)
	03.65.Yz	(Decoherence; open systems; quantum statistical methods)

Fund: Project supported by the Fundamental Research Funds for the Provincial Universities of Zhejiang Province, China (Grant No. GK199900299012-015), the National Natural Science Foundation of China (Grant Nos. 11574229, 11874287, and 11574068), and the Science Fund from the Shanghai Science and Technology Committee, China (Grant No. 18JC1410900).

Corresponding Authors: Hao-Zhen Li, Jing-Ping Xu
E-mail: haozhenli@hdu.edu.cn;xx_jj_pp@hotmail.com

Cite this article:

Hao-Zhen Li(李浩珍), Ran Zeng(曾然), Xue-Fang Zhou(周雪芳), Mei-Hua Bi(毕美华), Jing-Ping Xu(许静平), Ya-Ping Yang(羊亚平) Phase-modulated quadrature squeezing in two coupled cavities containing a two-level system 2020 Chin. Phys. B 29 050308

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Phase-modulated quadrature squeezing in two coupled cavities containing a two-level system

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