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Quantum State Transfer in Engineered Spin Chain under Influence of Spatially Distributed Environment
Zhou Lan; Lu Jing; Shi Tao; Zhou, L , Hunan Normal Univ, Dept Phys, Changsha 410081, Hunan, Peoples R China
2009
发表期刊COMMUNICATIONS IN THEORETICAL PHYSICS
ISSN0253-6102
卷号52期号:2页码:226-234
摘要It 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.
部门归属[Zhou, L; Lu, J] Hunan Normal Univ, Dept Phys, Changsha 410081, Hunan, Peoples R China; [Shi, T] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China
关键词Entanglement Generation Information Systems
学科领域Physics
资助者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] ; 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] ; 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]
收录类别SCI
资助者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] ; 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] ; 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]
WOS记录号WOS:000269337600007
引用统计
被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/5258
专题理论物理所SCI论文
通讯作者Zhou, L , Hunan Normal Univ, Dept Phys, Changsha 410081, Hunan, Peoples R China
推荐引用方式
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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