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Generation of Enhanced Three-Mode Continuously Variable Entanglement |
| YU You-Bin1**, WANG Huai-Jun1, FENG Jin-Xia2
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1School of Science, Ningbo University of Technology, Ningbo 315211
2State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006
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| Cite this article: |
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YU You-Bin, WANG Huai-Jun, FENG Jin-Xia 2011 Chin. Phys. Lett. 28 090304 |
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Abstract The generation of enhanced three-mode continuously variable (CV) entanglement via difference-frequency amplification in an optical cavity above the threshold is investigated. The quantum entanglement characteristics among the pump, signal, and idler beams are demonstrated by applying a sufficient inseparability criterion for CV entanglement proposed by van Loock and Furusawa. Bright three-mode CV entanglement with different frequencies can be generated in this simple system when the optical cavity operates above its threshold, and the best three-mode CV entanglement can be obtained when the pump threshold parameter is modulated at about σ=1.3.
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| Keywords:
03.67.Bg
03.67.-a
42.65.Yj
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Received: 19 October 2010
Published: 30 August 2011
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| PACS: |
03.67.Bg
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(Entanglement production and manipulation)
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03.67.-a
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(Quantum information)
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42.65.Yj
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(Optical parametric oscillators and amplifiers)
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