Scaling laws for the decay of multiqubit entanglement

被引：207

作者：

Aolita, L. ^{[1
]}

Chaves, R. ^{[1
]}

Cavalcanti, D. ^{[2
]}

Acin, A. ^{[2
,3
]}

Davidovich, L. ^{[1
]}

机构：

[1] Univ Fed Rio de Janeiro, Inst Fis, BR-21941972 Rio De Janeiro, RJ, Brazil

[2] ICFO, Barcelona 08860, Spain

[3] ICREA, Barcelona 08010, Spain

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.100.080501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the decay of entanglement of generalized N-particle Greenberger-Horne-Zeilinger (GHZ) states interacting with independent reservoirs. Scaling laws for the decay of entanglement and for its finite-time extinction (sudden death) are derived for different types of reservoirs. The latter is found to increase with N. However, entanglement becomes arbitrarily small, and therefore useless as a resource, much before it completely disappears, around a time which is inversely proportional to the number of particles. We also show that the decay of multiparticle GHZ states can generate bound entangled states.

引用

页数：4

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