Embedded Majorana islands  

作　　者：Jin-Xing Hou Alex Weststrom Rui Wang Wen-Li Yang Jian Li 

机构地区：[1]Institute of Modern Physics,Northwest University,Xi’an 710127,China [2]Department of Physics,School of Science,Westlake University,Hangzhou 310030,China [3]Shaanxi Key Laboratory for Theoretical Physics Frontiers,Xi’an 710127,China [4]Institute of Natural Sciences,Westlake Institute for Advanced Study,Hangzhou 310024,China [5]National Laboratory of Solid State Microstructures and Department of Physics,Nanjing University,Nanjing 210093,China [6]Collaborative Innovation Center for Advanced Microstructures,Nanjing 210093,China [7]Peng Huanwu Center for Fundamental Theory,Xi’an 710127,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2024年第9期154-164,共11页中国科学：物理学、力学、天文学（英文版）

基　　金：the support from the National Natural Science Foundation of China(Grant No.92265201);the support from the National Natural Science Foundation of China(Grant No.12247103);the support from the National Natural Science Foundation of China(Grant Nos.12322402,and 12274206);the Innovation Program for Quantum Science and Technology(Grant No.2021ZD0302704);the Shaanxi Fundamental Science Research Project for Mathematics and Physics(Grant No.22JSZ005)。

摘　　要：Mesoscopic superconducting islands hosting Majorana zero modes(MZMs),or Majorana islands in short,offer a prototype of topological qubits.In this work we investigate theoretically the model of a generic Majorana island tunneling-coupled to a singlepiece metallic substrate,hence an embedded Majorana island.We show the crucial consequences of an interplay between the topological ground states nonlocally addressed by the MZMs and the metallic bath with coherent electron propagation:on the one hand,the topological degeneracy on the Majorana island can be preserved,by virtue of the particle-hole symmetry,despite the apparent bath-induced coupling between MZMs;on the other hand,the electronic interference in the metallic bath may lead to profound alterations to the renormalization group behavior of the hybrid system towards low energy/temperature compared with conventional Kondo physics.This work serves to establish the model of embedded Majorana islands as an experimentally relevant and theoretically intriguing problem particularly in the direction of topological quantum computation.

关 键 词：topological quantum computation Majorana zero modes topological qubit mesoscopic superconductor topological Kondo effect 

分 类 号：O469[理学—凝聚态物理]