Electrically Detected Interferometry of Majorana Fermions in a Topological Insulator

被引：527

作者：

Akhmerov, A. R. ^{[1
]}

Nilsson, Johan ^{[1
]}

Beenakker, C. W. J. ^{[1
]}

机构：

[1] Leiden Univ, Inst Lorentz, NL-2300 RA Leiden, Netherlands

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 21期

关键词：

QUANTUM; STATES;

D O I：

10.1103/PhysRevLett.102.216404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Majorana fermions are zero-energy quasiparticles that may exist in superconducting vortices and interfaces, but their detection is problematic since they have no charge. This is an obstacle to the realization of topological quantum computation, which relies on Majorana fermions to store qubits in a way which is insensitive to decoherence. We show how a pair of neutral Majorana fermions can be converted reversibly into a charged Dirac fermion. These two types of fermions are predicted to exist on the metallic surface of a topological insulator (such as Bi2Se3). Our Dirac-Majorana fermion converter enables electrical detection of a qubit by an interferometric measurement.

引用

页数：4

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