通过全球量子矛盾识别多体局部化过渡.
Longhui Shen1, Jia Bao1, Bin Guo1
1Department of Physics, Wuhan University of Technology, Wuhan 430070, People's Republic of China.
概括
我们使用全球量子异调 (GQD) 研究了多体局部化过渡. 在识别这些过渡时,GQD证明比纠更强大,即使有有限大小的效应.
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
- 统计力学就是统计力学.
背景情况:
- 多体局部化 (MBL) 描述了量子系统无法热化的情况.
- 调查MBL转换对于理解量子混乱和混乱效应至关重要.
- 全球量子不一致 (GQD) 是量子相关性的新兴衡量标准.
研究的目的:
- 采用全球量子不一致 (GQD) 来表征多体局部化 (MBL) 过渡.
- 在MBL研究中,比较GQD与半链纠 (EE) 的疗效.
- 用随机磁场来确定旋转-1/2海森堡链中的MBL临界点.
主要方法:
- 使用全球量子不一致 (GQD) 作为MBL的探测器.
- 在疾病平均的GQD数据上进行有限尺寸缩放分析.
- 将GQD结果与已确定的半链纠 (EE) 方法进行比较.
主要成果:
- 疾病平均GQD成功估计了MBL临界点在Wc ≈ 3.8.8.
- 与EE相比,GQD在排除有限大小干扰方面表现出更好的能力.
- 使用GQD确定了一个关键点,与理论预测一致.
结论:
- 全球量子不一致 (GQD) 是一种强大而有效的工具,用于识别多体局部化 (MBL) 过渡.
- 在表征MBL时,GQD比纠的优势更大,因为它对有限尺寸效应具有弹性.
- 这项研究为使用量子相关性来探测复杂的量子现象提供了新的视角.
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