Investigation of the influence of extra noises in seed beams on continuous-variable entanglement generation |
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Authors: | Shang Ya-N Yan Zhi-Hui Jia Xiao-Jun Su Xiao-Long and Xie Chang-De |
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Institution: | 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 influence of the extra classical noises in seed beams on the entanglement between the signal and the idler modes of the output fields generated by a non-degenerate optical parametric amplifier operating at deamplification is investigated theoretically and experimentally. With the increase of the extra classical noises in the seed beams, the correlation degree of the output entangled optical fields, which is scaled by the quantum noise limit, decreases rapidly. The experimental results are in good agreement with the theoretical calculations. |
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Keywords: | quantum entanglement continuous variable classical noise |
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