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.
(Entanglement measures, witnesses, and other characterizations)
Fund: Project supported by the National Natural Science Foundation of China (Grants Nos. 60736040 and 11074157), Project for Excellent Research Team of the National Natural Science Foundation of China (Grant No. 60821004), the National Basic Research Program of China (Grant No. 2010CB923103).
Cite this article:
Shang Ya-Na(商娅娜),Yan Zhi-Hui(闫智辉),Jia Xiao-Jun(贾晓军), Su Xiao-Long(苏晓龙),and Xie Chang-De(谢常德) Investigation of the influence of extra noises in seed beams on continuous-variable entanglement generation 2011 Chin. Phys. B 20 034209
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