Output three-mode entanglement via coherently prepared inverted Y-type atoms

doi:10.1088/1674-1056/23/4/044203

中国物理B ›› 2014, Vol. 23 ›› Issue (4): 44203-044203.doi: 10.1088/1674-1056/23/4/044203

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Output three-mode entanglement via coherently prepared inverted Y-type atoms

王飞, 邱晶

College of Science, China Three Gorges University, Yichang 443002, China

收稿日期:2013-07-23 修回日期:2013-08-31 出版日期:2014-04-15 发布日期:2014-04-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 1137418 and 11104163) and the Science Foundation of Three Gorges University, China (Grant No. KJ2011B019).

Output three-mode entanglement via coherently prepared inverted Y-type atoms

Wang Fei (王飞), Qiu Jing (邱晶)

College of Science, China Three Gorges University, Yichang 443002, China

Received:2013-07-23 Revised:2013-08-31 Online:2014-04-15 Published:2014-04-15
Contact: Wang Fei E-mail:feiwang202@163.com
About author:42.50.Dv; 03.65.Ud; 42.50.Lc; 03.67.Bg
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 1137418 and 11104163) and the Science Foundation of Three Gorges University, China (Grant No. KJ2011B019).

摘要/Abstract

摘要： In this paper, the output quantum correlations of three fields interacting with inverted Y-type atoms inside a three-mode cavity are investigated. By numerically calculating the stationary noise spectra of the fields, we show that it is possible to generate the genuine tripartite continuous variable entanglement outside the cavity by coherently preparing the atoms in a superposition of the upper excited state and two ground states initially. Our numerical results demonstrate that both zero frequency entanglement and sideband frequency entanglement can be obtained under different initial coherent conditions. In addition, we investigate the thermal fluctuation effects on the quantum entanglement. It is found out that the entanglement occurring in a high frequency regime is more robust against thermal noise than the zero frequency entanglement, which may be useful for quantum communication.

关键词: tripartite entanglement, correlated spontaneous emission laser, inverted Y-type atom

Abstract: In this paper, the output quantum correlations of three fields interacting with inverted Y-type atoms inside a three-mode cavity are investigated. By numerically calculating the stationary noise spectra of the fields, we show that it is possible to generate the genuine tripartite continuous variable entanglement outside the cavity by coherently preparing the atoms in a superposition of the upper excited state and two ground states initially. Our numerical results demonstrate that both zero frequency entanglement and sideband frequency entanglement can be obtained under different initial coherent conditions. In addition, we investigate the thermal fluctuation effects on the quantum entanglement. It is found out that the entanglement occurring in a high frequency regime is more robust against thermal noise than the zero frequency entanglement, which may be useful for quantum communication.

Key words: tripartite entanglement, correlated spontaneous emission laser, inverted Y-type atom

中图分类号: (Quantum state engineering and measurements)

42.50.Dv

03.65.Ud (Entanglement and quantum nonlocality) 42.50.Lc (Quantum fluctuations, quantum noise, and quantum jumps) 03.67.Bg (Entanglement production and manipulation)

王飞, 邱晶. Output three-mode entanglement via coherently prepared inverted Y-type atoms[J]. 中国物理B, 2014, 23(4): 44203-044203.

Wang Fei (王飞), Qiu Jing (邱晶). Output three-mode entanglement via coherently prepared inverted Y-type atoms[J]. Chin. Phys. B, 2014, 23(4): 44203-044203.

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Output three-mode entanglement via coherently prepared inverted Y-type atoms

Output three-mode entanglement via coherently prepared inverted Y-type atoms

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