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Updated: May 13, 2025
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Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
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在正方形格子上的p波基塔耶夫链中,准Majorana模式
S Srinidhi1, Aayushi Agrawal2, Jayendra N Bandyopadhyay1
1Department of Physics, Birla Institute of Technology and Science-Pilani, Pilani, Rajasthan 333031, India.
概括
这项研究研究了拓超导体,揭示了与散装状态不同的无间隙边缘模式和准Majorana模式 (qMMs). 这些发现突出了迪拉克点和拓边缘状态,证实了一个弱的拓超导体模型.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 拓学材料科学科学 拓学材料科学
- 量子超导性 量子超导性 量子超导性
背景情况:
- 基塔耶夫链是研究超导体拓相的基本模型.
- 了解拓特征对于开发新型量子材料和设备至关重要.
- 在p波超导体中,近邻和次近邻相互作用的相互作用呈现出复杂的拓现象.
研究的目的:
- 在正方形格子上研究p波基塔耶夫链的拓特性.
- 识别和描述无间隙模式,包括精确的零能量模式和准Majorana模式 (qMMs).
- 探索在系统中迪拉克点和拓边缘状态的出现.
主要方法:
- 批量光谱和贝里曲率的分析,以确定奇点和.
- 在圆柱形几何学下的哈密尔顿检查以发现边缘特性.
- 应用开放边界条件和状态的局部密度来区分边缘状态.
主要成果:
- 识别不同于散态的拓无间隙阶段托管边缘模式 (qMMs).
- 在布里卢恩区域内发现四倍的迪拉克点,这些点来自布里卢恩区域内的两倍退化的波段.
- 由于有限大小的效应,对拓保护和混乱稳定的边缘状态的确认.
结论:
- 该系统表现出拓边缘模式,这是其迪拉克半金属特征的结果.
- 该模型展示了弱拓超导体的特征,由新出现的拓边缘状态和迪拉克点证明.
- 准Majorana模式 (qMMs) 被识别并与散装状态和Majorana零模式区分开来.
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