| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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The difference in noise property between the Autler–Townes splitting medium and the electromagnetically induced transparent medium |
| Li Zhong-Hua(李中华), Li Yuan(李媛), Dou Ya-Fang(豆亚芳), and Zhang Jun-Xiang(张俊香)† |
| State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China |
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Abstract The quantum noise of squeezed probe light passing through an atomic system with different electromagnetically induced transparency and Autler-Townes splitting effects is investigated theoretically. It is found that the optimal squeezing preservation of the outgoing probe beam occurs in the strong-coupling-field regime rather than in the weak-coupling-field regime. In the weak-coupling-field regime, which was recently recognized as the electromagnetically induced transparency regime (Abi-Salloum T Y 2010 Phys. Rev. A 81 053836), the output amplitude noise is affected mainly by the atomic noise originating from the random decay process of atoms. While in the strong-coupling-field regime, defined as the Autler-Townes splitting regime, the output amplitude noise is affected mainly by the phase-to-amplitude conversion noise. This is useful in improving the quality of the experiment for efficient quantum memory, and hence has an application in quantum information processing.
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Received: 10 October 2011
Revised: 09 November 2011
Accepted manuscript online:
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PACS:
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42.50.Gy
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(Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)
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42.50.Hz
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(Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)
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42.50.Lc
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(Quantum fluctuations, quantum noise, and quantum jumps)
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03.67.-a
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(Quantum information)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 10974126 and 60821004) and the National Basic Research Program of China (Grant No. 2010CB923102). |
Corresponding Authors:
Zhang Jun-Xiang,junxiang@sxu.edu.cn
E-mail: junxiang@sxu.edu.cn
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Cite this article:
Li Zhong-Hua(李中华), Li Yuan(李媛), Dou Ya-Fang(豆亚芳), and Zhang Jun-Xiang(张俊香) The difference in noise property between the Autler–Townes splitting medium and the electromagnetically induced transparent medium 2012 Chin. Phys. B 21 034204
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