Exact zero modes and decoherence in systems of interacting Majorana fermions

被引：13

作者：

Yang, Guang ^{[1
]}

Feldman, D. E. ^{[1
]}

机构：

[1] Brown Univ, Dept Phys, Providence, RI 02912 USA

来源：

PHYSICAL REVIEW B | 2014年 / 89卷 / 03期

基金：

美国国家科学基金会;

关键词：

QUANTUM COMPUTATION; STATES; ANYONS;

D O I：

10.1103/PhysRevB.89.035136

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Majorana fermions often coexist with other low-energy fermionic degrees of freedom. In such a situation, topological quantum computation requires the use of fermionic zero modes of a many-body system. We classify all such modes for interacting fermions and show how to select the mode that maximizes the decoherence time. We find that in a typical interacting system the maximal decoherence time is within one order of magnitude from the decoherence time of a qubit based on the local part of the fermion parity operator.

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页数：12

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