在米基尔文温度下对中性空隙中心的量子轨道状态控制
Hodaka Kurokawa1, Shintaro Nakazato2, Toshiharu Makino1,3
1Yokohama National University, Quantum Information Research Center, Institute of Advanced Sciences, 79-5 Tokiwadai, Hodogaya, Yokohama, 240-8501, Japan.
Physical review letters
|July 31, 2025
概括
研究人员在中性空中心 (NV0) 和微波光子之间实现了强烈的合. 降低温度和使用动态解显著改善了连贯时间,使量子电动力学应用成为可能.
科学领域:
- 量子光学和光子学 量子光学和光子学
- 固态物理 固态物理
- 量子信息科学 量子信息科学
背景情况:
- 由于其电场灵敏度,钻石中的中性空隙中心 (NV0) 对量子应用具有前景.
- NV0中心容易受到环境声声噪声的影响,在更高的温度 (例如5K) 上限制了它们的相干时间.
- 在量子发射器和微波光子之间实现强的合对于量子电动力学和量子信息处理至关重要.
研究的目的:
- 调查用于强合应用的NV0中心增强连贯时间的方法.
- 探索在单个NV0中心和微波光子之间实现强合的可行性.
- 用钻石中的光学活性缺陷中心来证明微波量子电动学的潜力.
主要方法:
- 在冷温度 (15mK) 下对NV0中心特性进行实验调查.
- 在不同温度下测量轨道放松时间.
- 动态解脉冲序列的应用,以延长轨道连贯时间.
主要成果:
- 当温度从5K降低到15mK时,NV0中心的轨道放松时间增加了十倍.
- 动态解脉冲将轨道连贯时间延长到超过1.6μs,改进了30倍.
- 这些增强的连贯时间表明,单个NV0中心可以通过高阻抗微波共振器达到强联接状态.
结论:
- 低温温度和动态脱是克服NV0中心脱的有效策略.
- 经证明的改进为在强联接制度中使用单个NV0中心铺平了道路.
- 这项研究为实现光学活性钻石缺陷中心的微波量子电动学开辟了可能性.
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