在周期驱动系统中,非阿贝尔式的Floquet编和异常的迪拉克弦相
Robert-Jan Slager1, Adrien Bouhon2, F Nur Ünal3
1TCM Group, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, United Kingdom. rjs269@cam.ac.uk.
Nature communications
|February 7, 2024
概括
周期性驱动诱导了没有静态对应的新型拓相,揭示了Floquet诱导的非阿贝尔编织和异常的迪拉克弦相. 这为探索动态拓物质和量子模拟开辟了新的途径.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 量子材料 量子材料是一种量子材料.
- 关于物质的拓阶段
背景情况:
- 传统的拓材料表征依赖于对称性,但新的多间隙依赖拓状态会带来挑战.
- 这些多间隙状态具有超越现有的基于对称的方法的特性,需要进一步探索.
- 虽然在平衡状态下进行了研究,但它们在失衡条件下的行为在很大程度上仍未被绘制出来.
研究的目的:
- 研究失衡过程与多间隙拓见解之间的相互作用.
- 探索由周期性驱动引发的缺乏静态对应的新型拓阶段.
- 在动态系统中识别和描述新的拓不变量和相位.
主要方法:
- 将周期驱动 (Floquet工程) 应用于多间隙拓系统.
- 识别和分析Floquet诱导的非阿贝尔编织现象.
- 使用诸如欧勒类之类的不变量来表征拓相,并研究异常的迪拉克字符串配置.
主要成果:
- 周期性驱动会诱导异常的多间隙拓特性,这种特性在静态系统中是不存在的.
- 识别了浮盘诱导的非阿贝尔编织,导致具有异常欧勒类的阶段.
- 发现了"异常的迪拉克弦相"的第一个例子,其特点是独特的边缘状态.
结论:
- 周期性驱动是发现和控制新型多间隙拓阶段的强大工具.
- 这些发现为探索内在动态和实验上可访问的拓物质提供了基础.
- 定期驾驶有助于观察非阿贝尔编织过程,特别是在量子模拟器中.
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