文献类型：期刊文献

英文题名：Manipulation of Majorana fermions by point-like gate voltage in the Vortex state of a topological superconductor

作者：Liang, Qi-Feng[1,2];Wang, Zhi[1];Hu, Xiao[1]

机构：[1]Natl Inst Mat Sci, Int Ctr Mat Nanoarchitectorn WPI MANA, Tsukuba, Ibaraki 3050044, Japan;[2]Shaoxing Univ, Dept Phys, Shaoxing 312000, Peoples R China

年份：2012

卷号：99

期号：5

外文期刊名：EPL

收录：SCI-EXPANDED(收录号：WOS:000308862300004)、、Scopus(收录号：2-s2.0-84866250849)、WOS

基金：This work was supported by WPI Initiative on Materials Nanoarchitectonics, MEXT of Japan, and Grants-in-Aid for Scientific Research (No. 22540377), JSPS, and partially by CREST, JST. QFL is also supported by NSFC under grants 10904092.

语种：英文

外文摘要：A vortex in a topological superconductor induces two Majorana fermions (MFs), one in the core and the other at the sample edge. Here we demonstrate that edge MFs can be transported and braided by turning gate voltages on and off at the point-like constriction junctions between samples. The controllable high mobility of edge MFs is due to the topological property, namely an edge MF appears when the sample perimeter includes odd vorticity, and disappears for even vorticity. As shown explicitly by solving the time-dependent Bogoliubov-de Gennes equation, disturbance to the quantum coherence of MFs during braiding is negligibly small in this scheme due to the point-like application of the gate voltage. The present work bridges for the first time the fundamental topological features of edge MFs and their adiabatic dynamics which is important for performing topological quantum computation.