{
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    "abstract": "This paper has been withdrawn by the authors",
    "arxiv_id": "physics/0502116",
    "authors": [
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      "Jian Wu",
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      "Han Xu"
    ],
    "categories": [
      "physics.optics"
    ],
    "title": "Two-dimensional array of multicolored upconverted parametric   amplification",
    "url": "https://arxiv.org/abs/physics/0502116"
  },
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