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题名: Effects of initial correlations on the dynamics of dissipative systems
作者: Pollak, Eli1;  Shao, Jiushu2;  Zhang, Dong Hui3, 4
通讯作者: Eli Pollak
刊名: PHYSICAL REVIEW E
发表日期: 2008-02-01
DOI: 10.1103/PhysRevE.77.021107
卷: 77, 期:2, 页:021107-1-021107-9
收录类别: SCI
文章类型: Article
部门归属: 11
项目归属: 1102
产权排名: 3;3
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Physics, Fluids & Plasmas ;  Physics, Mathematical
研究领域[WOS]: Physics
英文摘要: The time correlation functions for a Gaussian wave-packet preparation of the dissipative harmonic oscillator evolving from three initial conditions for the heat bath are calculated and compared with each other for Ohmic heat baths. The three initial distributions for the bath are the factorized, partially factorized, and unfactorized distributions. Explicit analytical formulas are derived and then used to study the effect of the three initial distributions on the subsequent dynamics. We find that the transient behavior does not depend sensitively on the initial condition as long as the initial Gaussian wave function of the system is centered at the equilibrium point. Differences become noticeable as the center of the wave packet is significantly shifted from the equilibrium point. These observations justify to some extent the prevalent use of factorized initial conditions for studying real time quantum dynamics in dissipative systems. The total energy in the system is also calculated for the three initial states and its relation to features in the decay is pointed out.
关键词[WOS]: QUANTUM BROWNIAN-MOTION ;  DAMPED HARMONIC-OSCILLATOR ;  GENERAL ENVIRONMENT ;  INTEGRAL APPROACH ;  MASTER EQUATION ;  DECOHERENCE ;  RATES ;  TRANSITION ;  SIMULATION ;  DERIVATION
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000253763700021
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/101337
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Weizmann Inst Sci, Dept Phys Chem, IL-76100 Rehovot, Israel
2.Beijing Normal Univ, Coll Chem, Beijing 100875, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, Ctr Theoret & Computat Chem, Dalian 116023, Peoples R China
4.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China

Recommended Citation:
Pollak, Eli,Shao, Jiushu,Zhang, Dong Hui. Effects of initial correlations on the dynamics of dissipative systems[J]. PHYSICAL REVIEW E,2008,77(2):021107-1-021107-9.
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