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存储和检索远程量子记忆之间传输的单个光子
T Chanelière1, D N Matsukevich, S D Jenkins
1School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.
Nature
|December 13, 2005
概括
研究人员使用光子在两个原子记忆节点之间展示了单个量子比特 (量子比特) 的传输. 这种量子网络的进步使得存储时间更长,这对于构建分布式量子网络至关重要.
科学领域:
- 量子信息科学 量子信息科学
- 量子网络是一个量子网络.
- 原子物理 原子物理
背景情况:
- 量子网络操作需要在物质 (原子记忆) 和光 (光子) 量子状态之间进行有效的映射.
- 在原子组合中存储和检索量子信息对于量子通信至关重要.
研究的目的:
- 为了证明两个遥远的原子集团之间的单个量子的生成,传输,存储和检索.
- 建立分布式量子网络的基础元素.
主要方法:
- 从冷原子组合中生成一个单一光子.
- 通过100米的光纤传输光子到第二个原子组合.
- 将光子转化为集体原子激发 (暗态极子) 并随后恢复回光子.
主要成果:
- 单个量子的存储和检索成功,存储时间为0.5微秒,通过反相关性测量证实.
- 观察到的存储时间超过10微秒,通过强度交叉相关性测量来验证.
- 证明储存时间比量子状态转换时间长得多 (大小的两个数量级).
结论:
- 在远程量子记忆之间对单个量子的控制转移得到了实验验证.
- 这一成就代表了实现功能分布式量子网络的重大进步.
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