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Zhou Lan; Lu Jing; Shi Tao; Zhou, L , Hunan Normal Univ, Dept Phys, Changsha 410081, Hunan, Peoples R China
Quantum State Transfer in Engineered Spin Chain under Influence of Spatially Distributed Environment
Source PublicationCOMMUNICATIONS IN THEORETICAL PHYSICS
KeywordEntanglement Generation Information Systems
AbstractIt has been shown that a quantum state could be perfectly transferred via a spin chain with engineered "always-on interaction". In this paper, we study a more realistic problem for such a quantum state transfer (QST) protocol, how the efficacy of QST is reduced by the quantum decoherence induced by a spatially distributed environment. Here, the environment is universally modeled as a bath of fermions located in different positions. By making use of the irreducible tensor method in angular momentum theory, we investigate the effect of environment on the efficiency of QST for both cases at zero and finite temperatures. We not only show the generic exponential decay of QST efficiency as the number of sites increase, but also find some counterintuitive effect, the QST can be enhanced as temperature increases in some cases.
2009
ISSN0253-6102
Volume52Issue:2Pages:226-234
Subject AreaPhysics
Indexed BySCI
Funding OrganizationNSFC[10775048, 10704023]; NFRPC[2007CB925204]; New Century Excellent Talents in University[NCET-08-0682]; Scientific Research Fund of Hunan Provincial Education Department of China[07C579] ; NSFC[10775048, 10704023]; NFRPC[2007CB925204]; New Century Excellent Talents in University[NCET-08-0682]; Scientific Research Fund of Hunan Provincial Education Department of China[07C579] ; NSFC[10775048, 10704023]; NFRPC[2007CB925204]; New Century Excellent Talents in University[NCET-08-0682]; Scientific Research Fund of Hunan Provincial Education Department of China[07C579] ; NSFC[10775048, 10704023]; NFRPC[2007CB925204]; New Century Excellent Talents in University[NCET-08-0682]; Scientific Research Fund of Hunan Provincial Education Department of China[07C579]
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/5258
Collection理论物理所科研产出_SCI论文
Corresponding AuthorZhou, L , Hunan Normal Univ, Dept Phys, Changsha 410081, Hunan, Peoples R China
Recommended Citation
GB/T 7714
Zhou Lan,Lu Jing,Shi Tao,et al. Quantum State Transfer in Engineered Spin Chain under Influence of Spatially Distributed Environment[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2009,52(2):226-234.
APA Zhou Lan,Lu Jing,Shi Tao,&Zhou, L , Hunan Normal Univ, Dept Phys, Changsha 410081, Hunan, Peoples R China.(2009).Quantum State Transfer in Engineered Spin Chain under Influence of Spatially Distributed Environment.COMMUNICATIONS IN THEORETICAL PHYSICS,52(2),226-234.
MLA Zhou Lan,et al."Quantum State Transfer in Engineered Spin Chain under Influence of Spatially Distributed Environment".COMMUNICATIONS IN THEORETICAL PHYSICS 52.2(2009):226-234.
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