Decoherence-free subspaces for quantum computation

被引：1518

作者：

Lidar, DA ^{[1
]}

Chuang, IL

Whaley, KB

机构：

[1] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA

[2] IBM, Almaden Res Ctr, San Jose, CA 94120 USA

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 12期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.81.2594

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Decoherence in quantum computers is formulated within the semigroup approach. The error generators are identified with the generators of a Lie algebra. This allows for a comprehensive description which includes as a special case the frequently assumed spin-boson model. A generic condition is presented for errorless quantum computation: decoherence-free subspaces are spanned by those states which are annihilated by all the generators. It is shown that these subspaces are stable to perturbations and, moreover, that universal quantum computation is possible within them. [S0031-9007(98)07057-4].

引用

页码：2594 / 2597

页数：4

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