在Fabry-Pérot量子大厅干扰仪中的硬和软相位滑动
N L Samuelson1, L A Cohen1, W Wang1
1University of California at Santa Barbara, Department of Physics, Santa Barbara, California 93106, USA.
Physical review letters
|July 31, 2025
概括
量子霍尔干扰仪揭示了缓慢的准粒子动态. 我们观察到相位滑动,表明准粒子进入干扰仪散体,平衡时间长达几分钟,区分均和缺陷局部准粒子.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 量子光学是一种量子光学.
- 材料科学 材料科学 材料科学
背景情况:
- 量子霍尔Fabry-Pérot干扰仪探测了散体准粒子特性和散体边缘合.
- 以前的研究假设与干扰仪进行快速的准粒子交换,忽视了缓慢的动态.
研究的目的:
- 研究量子霍尔干扰仪中准粒子平衡时间的作用.
- 描述准粒子动力学及其对干扰相的影响.
- 在干扰仪内区分各种准粒子定位机制.
主要方法:
- 一个单层石墨烯量子霍尔干扰仪的制造和测量.
- 在填充因子 ν=-1 和 ν=-2 的整数量子霍尔模式下运行.
- 分析量子干扰相位滑动作为磁场的函数.
主要成果:
- 观察到的相位滑动直接与准粒子进入干扰仪散体有关.
- 确定准粒子平衡时间,揭示它们可以延长到几分钟.
- 确定了两个不同的阶段滑动类别:来自均合的散装水池和来自缺陷陷准粒子的.
结论:
- 量子霍尔干扰仪中的准粒子平衡可以显著缓慢,挑战以前的平衡假设.
- 观察到的相位滑动为准粒子动态和定位提供了敏感的探测器.
- 区分不同的准粒子状态为量子霍尔系统中的混乱和相互作用提供了新的见解.
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