[公式:参阅文本]中的量子雪崩 - - 保存互动的Ising Majorana链
Lv Zhang1,2, Kai Xu3, Heng Fan3
1Institute of Physics, Chinese Academy of Sciences, Beijing National Laboratory for Condensed Matter Physics, Beijing, 100190, China. zhanglv@iphy.ac.cn.
Scientific reports
|December 19, 2025
概括
量子系统中的多体局部化 (MBL) 阶段在有限的大小下是不稳定的,这是由于热化区域的雪崩效应造成的. 这项研究表明,在这些条件下,MBL的磁性和自旋玻璃相变得不稳定.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 量子多体系统是一个量子多体系统.
- 无序的系统是无序的系统.
背景情况:
- 最近的数值研究强调了有限大小无序量子系统中多体局部化 (MBL) 阶段的不稳定性.
- 这种不稳定性归因于罕见的格里菲斯区域,这些区域热化并触发了雪崩机制,破坏了MBL周围地区的稳定.
研究的目的:
- 为了研究一个[公式:参见文本]的动态特征 - - 保存相互作用的Ising Majorana链,与扰动下的无限浴相合.
- 通过分析最慢的热化速率的缩放行为来确定雪崩机制如何影响有限大小系统中的关键障碍强度.
- 使用嵌入式包容模型探测热气泡的扩散和相互信息的时间演变.
主要方法:
- 一个[公式:参见文本]的数值模拟 - - 保存交互的Ising Majorana链.
- 分析最慢的热化速率的缩放行为,以了解雪崩机制对关键障碍强度的影响.
- 嵌入式包含模型的实施和相互信息的时间演变,以跟踪热泡扩散.
主要成果:
- 在有限大小的系统中,临界障碍强度被雪崩机制所影响.
- 嵌入式包含模型揭示了源自格里菲斯区域的热气泡的扩散.
- 在有限大小的系统中,观察到临界乱强度逐渐偏离中心.
结论:
- 已经证明,MBL 的偏磁阶段和 MBL 的自旋玻璃阶段在有限的尺寸下都是不稳定的.
- 这些发现强调了在研究MBL阶段时考虑有限尺寸效应和雪崩机制的重要性.
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