Non-Markovian dynamics in a spin star system: the failure of thermalisation

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	Non-Markovian dynamics in a spin star system: the failure of thermalisation
	Wang, ZH ; Guo, Y ; Zhou, DL
刊名	EUROPEAN PHYSICAL JOURNAL D
	2013
卷号	67 期号:11
ISSN号	1434-6060
通讯作者	Wang, ZH (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要	In most cases, a small system weakly interacting with a thermal bath will eventually reach a thermal state with the temperature of the bath. We show that this intuitive picture is not always true, by using a spin star model where the non-Markov effect dominates the dynamical process. The spin star system consists of a central spin homogeneously interacting with an ensemble of identical noninteracting spins. We find that the correlation time of the bath is infinite, which implies that the bath has a perfect memory, and that the dynamical evolution of the central spin must be non-Markovian. A direct consequence of this is that the final state of the central spin is not the thermal state in equilibrium with the bath, but a steady state which depends on the initial state of the spin.
资助信息	National NSF of China [10975181, 11175247, 11105020]; NKBRSF of China [2012CB922104]; China Postdoctoral Science Foundation
语种	英语
公开日期	2014-01-16
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/57257]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Wang, ZH,Guo, Y,Zhou, DL. Non-Markovian dynamics in a spin star system: the failure of thermalisation[J]. EUROPEAN PHYSICAL JOURNAL D,2013,67(11).
APA	Wang, ZH,Guo, Y,&Zhou, DL.(2013).Non-Markovian dynamics in a spin star system: the failure of thermalisation.EUROPEAN PHYSICAL JOURNAL D,67(11).
MLA	Wang, ZH,et al."Non-Markovian dynamics in a spin star system: the failure of thermalisation".EUROPEAN PHYSICAL JOURNAL D 67.11(2013).