О дираковской массе хаббардовских фермионов в сильно коррелированном топологическом сверхпроводнике высокого порядка

Сергей Владимирович Аксенов, А. Д. Федосеев, М. С. Шустин, А. О. Злотников
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Abstract

Majorana corner modes have a number of advantages over the classical Majorana states in terms of performing topologically protected quantum computations. However, the problem of the influence of Coulomb repulsion on higher-order phases, which inevitably arises when trying to implement such systems in practice, has been poorly studied. In this article, we analyze the features of a topological invariant describing the nontrivial phase with the corner modes for a two-dimensional two-orbital model of a hybrid structure in the regime of extremely strong electron correlations. For this purpose, approximate wave functions of the edge states with a linear dispersion law and the associated Dirac masses, which arise when superconducting pairing in the system is taken into account, are obtained.
狄拉克质量哈伯德费米子在高度相关的拓扑超导体
在执行拓扑保护量子计算方面,马约拉纳角模式比经典马约拉纳态具有许多优势。然而,库仑斥力对高阶相的影响问题,在实践中不可避免地会出现,研究很少。本文分析了杂化结构二维双轨模型在极强电子相关条件下,用角模描述非平凡相位的拓扑不变量的特征。为此,得到了考虑系统中超导配对时产生的具有线性色散规律的边缘态的近似波函数和相关的狄拉克质量。
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