Dividing two-qubit Hilbert space via abrupt and asymptotic disentanglement

被引：17

作者：

Li, Peng ^{[1
,2
,3
]}

Zhang, Qun ^{[3
]}

You, J. Q. ^{[1
,2
]}

机构：

[1] Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China

[2] Fudan Univ, Surface Phys Lab, Natl Key Lab, Shanghai 200433, Peoples R China

[3] Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China

来源：

PHYSICAL REVIEW A | 2009年 / 79卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Hilbert spaces; quantum computing; quantum entanglement; SUDDEN-DEATH; ENTANGLEMENT; DECOHERENCE;

D O I：

10.1103/PhysRevA.79.014303

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We theoretically show that according to the disentanglement behavior under a composite noise environment, the Hilbert space of a two-qubit system can be divided into two separate parts: a three-dimensional subspace in which all states disentangle asymptotically, and the rest in which all states disentangle abruptly. The violation of additivity for entanglement decay rates under weak noises [Phys. Rev. Lett. 97, 140403 (2006)] can be explained using such Hilbert-space division.

引用

页数：4

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