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Dynamics of the sub-Ohmic spin-boson model: A time-dependent variational study
Wu, N; Duan, LW; 李昕; Li, X; Zhao, Y
2013
发表期刊JOURNAL OF CHEMICAL PHYSICS
卷号138期号:8页码:84111
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]
学科领域Physics
DOI10.1063/1.4792502
收录类别SCI
WOS记录号WOS:000315667800013
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被引频次:28[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/224598
专题理论物理室
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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.
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