在一个随机二进制无序的SSH网格中观察重新进入的金属绝缘器过渡
Ze-Sheng Xu1, Jun Gao1, Adrian Iovan1
1Department of Applied Physics, KTH Royal Institute of Technology, Albanova University Centre, Roslagstullsbacken 21, 106 91 Stockholm, Sweden.
Npj nanophotonics
|June 10, 2024
概括
无序的量子系统可以令人惊地回到导电状态,这种现象被称为回入局域定位. 这项研究通过实验证实了光子格子中的回入局域定位,挑战了传统的物理模型.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 量子运输是一种量子运输.
- 光子学 是一个光子学.
背景情况:
- 一维系统中的混乱通常会加剧局部化,导致金属绝缘体过渡.
- 理论工作预测了由于二分化和混乱而导致的重新进入者本地化,这是一个尚未实验观察到的现象.
研究的目的:
- 在一个无序的系统中实验性地观察重新进入的局部化.
- 为了研究二元化和混乱在量子运输中的作用.
- 为了证明集成光子学对凝聚物质模拟的实用性.
主要方法:
- 使用光子Su-Schrieffer-Heeger (SSH) 格子与工程随机二次元乱.
- 系统地改变合成潜能以控制障碍水平.
- 通过激发特定的格子位点和测量光分布来探测波函数的定位.
- 分析了正常化参与率以确定异常行为.
主要成果:
- 提供了第一个实验证据,证明了在无序的光子晶格中重新进入的局部化.
- 观察到扩展波函数的行为在最初的局部化过渡后,随着障碍的增加.
- 检测到正常化参与率的异常峰值,证实了回归现象.
结论:
- 实验结果验证了对重新进入者本地化的理论预测.
- 这项研究促进了对无序介质中的量子传输的理解.
- 集成光子学为模拟复杂的凝聚物质现象提供了一个强大的平台.
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