超冷场连接的四原子分子
Xing-Yan Chen1,2, Shrestha Biswas1,2, Sebastian Eppelt1,2
1Max-Planck-Institut für Quantenoptik, Garching, Germany.
Nature
|January 31, 2024
概括
研究人员使用电联制造了超冷的多原子分子. 这种新方法产生了稳定的四原子分子, 显著推进了冷化学和量子技术.
科学领域:
- 原子,分子和光学物理学
- 量子化学
- 凝聚物质物理学
背景情况:
- 由于其复杂的结构,超冷的多原子分子对冷化学,精确测量和量子信息处理具有价值.
- 与二氧化物相比,传统的冷却技术面临着多原子分子复杂性增加的挑战.
研究的目的:
- 为了展示一种创新的方法来制造弱结的超冷多原子分子.
- 通过电场连接共振利用微波穿戴的极性分子在退化的费米气体中的电联.
主要方法:
- 从基本状态的分子开始.
- 通过微波穿戴的极性分子的退化费米气体的场连接共振使用电联.
- 使用微波场调制直接成像分离的四元体.
主要成果:
- 成功创建了大约1.1 × 10^3的弱结四原子 (NaK) 2分子.
- 在134nK时达到0.040的相空间密度,比之前的四原子分子冷3000倍以上.
- 观察到最大四极体寿命为8~2毫秒,即使在光双极陷中也显示出碰撞稳定性.
结论:
- 展示的电联方法是从较小的极性分子组装弱结合的超冷多原子分子的通用工具.
- 这是多原子分子的斯-爱因斯坦凝聚的关键步骤,并从双极超流体转化为四极体斯-爱因斯坦凝聚物.
- 长期存在的电场连接状态是确定性光学转移到深度结合的四聚体状态的理想前体.
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