Majorana zero modes in Y-shape interacting Kitaev wires

被引：12

作者：

Pandey, Bradraj ^{[1
,2
]}

Kaushal, Nitin ^{[2
]}

Alvarez, Gonzalo ^{[3
]}

Dagotto, Elbio ^{[1
,2
]}

机构：

[1] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

[2] Oak Ridge Natl Lab, Mat Sci & Technol Div, POB 2009, Oak Ridge, TN 37831 USA

[3] Computat Sci & Engn Div, Oak Ridge, TN 37831 USA

来源：

NPJ QUANTUM MATERIALS | 2023年 / 8卷 / 01期

关键词：

QUANTUM; STATE;

D O I：

10.1038/s41535-023-00584-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Motivated by the recent experimental realization of minimal Kitaev chains using quantum dots, we investigate the Majorana zero modes (MZM) in Y-shape Kitaev wires. We solve the associated Kitaev models analytically at the sweet spot (t(h)=Delta) and derive the exact form of MZM wave-functions in this geometry. We observed exotic multi-site MZMs located near the junction center, on the nearby edge sites of each leg. This result is important for potential braiding of Majoranas and the performance of Y-junctions made from arrays of quantum dots. Furthermore, we study the stability of local (single-site) and multi-site MZMs modes in the presence of Coulomb repulsion, using density matrix renormalization group theory. Our local density-of-states calculation shows that these multi-site MZMs are as equally topologically protected as the single-site MZMs when in the presence of Coulomb repulsion or when away from the sweet-spot.

引用

页数：8