Dynamics of the sub-Ohmic spin-boson model: A time-dependent variational study

	Dynamics of the sub-Ohmic spin-boson model: A time-dependent variational study
	Wu, N; Duan, LW; 李昕; Li, X; Zhao, Y
刊名	JOURNAL OF CHEMICAL PHYSICS
	2013
卷号	138 期号:8 页码:84111
英文摘要	The Dirac-Frenkel time-dependent variation is employed to probe the dynamics of the zero temperature sub-Ohmic spin-boson model with strong friction utilizing the Davydov D-1 ansatz. It is shown that initial conditions of the phonon bath have considerable influence on the dynamics. Counterintuitively, even in the very strong coupling regime, quantum coherence features still manage to survive under the polarized bath initial condition, while such features are absent under the factorized bath initial condition. In addition, a coherent-incoherent transition is found at a critical coupling strength alpha approximate to 0.1 for s = 0.25 under the factorized bath initial condition. We quantify how faithfully our ansatz follows the Schrodinger equation, finding that the time-dependent variational approach is robust for strong dissipation and deep sub-Ohmic baths (s << 1). (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4792502]
学科主题	Physics
收录类别	SCI
WOS记录号	WOS:000315667800013
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/224598]
专题	高能物理研究所_理论物理室
推荐引用方式 GB/T 7714	Wu, N,Duan, LW,李昕； Li, X,et al. Dynamics of the sub-Ohmic spin-boson model: A time-dependent variational study[J]. JOURNAL OF CHEMICAL PHYSICS,2013,138(8):84111.
APA	Wu, N,Duan, LW,李昕； Li, X,&Zhao, Y.(2013).Dynamics of the sub-Ohmic spin-boson model: A time-dependent variational study.JOURNAL OF CHEMICAL PHYSICS,138(8),84111.
MLA	Wu, N,et al."Dynamics of the sub-Ohmic spin-boson model: A time-dependent variational study".JOURNAL OF CHEMICAL PHYSICS 138.8(2013):84111.