超流体的签名在一个分散的量子接触点的接触点
Meng-Zi Huang1, Jeffrey Mohan1, Anne-Maria Visuri2
1Institute for Quantum Electronics, ETH Zürich, 8093 Zürich, Switzerland.
Physical review letters
|June 2, 2023
概括
强烈相互作用的铁离子原子显示超流体运输变化与粒子损失. 高级安德列夫反射过渡到欧米电流,当消散超过超流体间隙时.
科学领域:
- 量子物理学的量子物理学
- 凝聚物质物理学 凝聚物质物理学
- 原子物理 原子物理
背景情况:
- 强烈相互作用的费米气体中的超流动性对于理解量子多体现象至关重要.
- 量子点接触对于探测美索斯科普系统中的传输特性至关重要.
- 粒子损失引入散射,显著改变量子传输特征.
研究的目的:
- 为了研究局部,自旋依赖的粒子损失对铁离子原子中的超流体运输的影响.
- 为了探索从非欧姆到欧姆超流体运输在不断增加的消散下的过渡.
- 用理论框架建模观察到的运输现象.
主要方法:
- 通过使用铁离子原子通过量子点接触测量超流体运输的实验.
- 引入局部,自旋依赖的粒子损失作为散射源.
- 开发一个理论模型,涉及中场水库和散射场.
- 凯尔迪什形式主义用于不平衡计算的应用.
主要成果:
- 观察到,随着消散强度的增加,从特征性的非欧姆超流体传输转变为多余的欧姆电流.
- 过渡点被确定在消散超过超流体间隙时.
- 开发的模型成功地重现了观察到的不平衡粒子电流.
结论:
- 当地粒子损失从根本上改变了强烈相互作用的费米气体中的超流体运输.
- 过渡到欧米态的行为与消除超流体间隙的消散有关.
- 虽然解释了粒子电流,但该模型需要进一步细化,以充分考虑观察到的损失率和旋转电流.
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