弹性无穷无尽的随机性 对于一个无序的连锁互动的Majorana费米子的关键性
Natalia Chepiga1, Nicolas Laflorencie2
1Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands.
Physical review letters
|February 16, 2024
概括
在无序链中相互作用的Majorana子对相互作用保持稳定,这与之前的说法相反. 这项研究证实了Majorana系统中非相互作用的无限随机固定点 (IRFP) 的稳定性.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 量子的关键性 量子的关键性
- 无序的系统是无序的系统.
背景情况:
- 与混乱相互作用的费米子的量子关键性质尚未完全理解.
- 对于迪拉克费米子来说,相互作用与非相互作用的无限随机固定点 (IRFP) 无关.
- 在有相互作用的无序系统中,Majorana费米子的行为不太清楚,尽管有更丰富的无乱相图.
研究的目的:
- 在一个有相互作用的无序系统中研究马约拉纳费米子的量子关键性质.
- 为了确定非相互作用的无限随机固定点 (IRFP) 与Majorana链中的有限相互作用的稳定性.
主要方法:
- 使用密度矩阵重规范化组 (DMRG) 模拟.
- 检查了Majorana链的基态属性,其中有混乱和相互作用.
- 分析了包括纠,能量差距和相关性在内的关键可观察值,使用适当的边界条件.
主要成果:
- 非相互作用的Majorana无限随机固定点 (IRFP) 显示出与有限相互作用相对显著的稳定性.
- 观察到的稳定性与之前的理论主张相矛盾,这些主张表明相互作用显著改变了Majorana系统中的IRFP.
结论:
- 有限相互作用不会在存在混乱的情况下破坏非相互作用的Majorana IRFP的稳定性.
- 这些发现突显了Majorana IRFP的稳定性,为无序费米子系统中的量子关键性提供了新的见解.
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