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arXiv 1402.2944quant-ph
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基于钻石NV中心的量子通信低噪声下变频

A low-noise frequency down-conversion to the telecommunication band for a quantum communication based on NV centers in diamond

Rikizo Ikuta, Toshiki Kobayashi, Shuto Yasui, Shigehito Miki, Taro Yamashita, Hirotaka Terai, Mikio Fujiwara, Takashi Yamamoto, Masato Koashi, Masahide Sasaki, … 展开作者

Rikizo Ikuta, Toshiki Kobayashi, Shuto Yasui, Shigehito Miki, Taro Yamashita, Hirotaka Terai, Mikio Fujiwara, Takashi Yamamoto, Masato Koashi, Masahide Sasaki, Zhen Wang, Nobuyuki Imoto

摘要:

我们证明了低噪声频率下转换的光子在637 nm的电信频带在1587 nm的差频产生在一个极化的锂离子电池。转换器的内部转换效率估计为0.44,这是通过430 mW的泵浦功率实现的最大值,而由强cw泵浦激光器引起的内部背景光子的速率估计为在约1 nm的带宽内为9 kHz/mW。利用与转换器本征特性有关的实验值,并利用637 nm输入光脉冲的强度相关和平均光子数,推导出转换后的电信光脉冲的强度相关。讨论了利用金刚石中的NV中心实现单光子频率转换到通信波段进行长距离量子通信的可行性。

英文摘要:

We demonstrate a low-noise frequency down-conversion of photons at 637 nm to the telecommunication band at 1587 nm by the difference frequency generation in a periodically-poled lithium niobate. An internal conversion efficiency of the converter is estimated to be 0.44 at the maximum which is achieved by a pump power of 430 mW, whereas a rate of internal background photons caused by the strong cw pump laser is estimated to be 9 kHz/mW within a bandwidth of about 1 nm. By using the experimental values related to the intrinsic property of the converter, and using the intensity correlation and the average photon number of a 637-nm input light pulse, we derive the intensity correlation of a converted telecom light pulse. Then we discuss feasibility of a single-photon frequency conversion to the telecommunication band for a long-distance quantum communication based on NV centers in diamond.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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