Density matrix method and ultrafast processes

doi:10.1007/s11426-012-4547-4

CORC > 化学研究所 > 中国科学院化学研究所

	Density matrix method and ultrafast processes
	Niu YingLi 1; Lin ChihKai 2; Zhu ChaoYuan 2; Mineo Hirobumi 3; Chao ShengDer 2; Fujimura Yuichi 3; Hayashi Michitoshi 3; Lin ShengHsien 2
刊名	SCIENCE CHINA-CHEMISTRY
	2012-04-01
卷号	55 期号:4 页码:579-593
关键词	Density Matrix Master Equation Conical Intersection Vibrational Relaxation
ISSN号	1674-7291
DOI	10.1007/s11426-012-4547-4
英文摘要	When femto-second (fs) time-resolved experiments are used to study ultrafast processes, quantum beat phenomena are often observed. In this paper, to analyze the fs time-resolved spectra, we will present the density matrix method, a powerful theoretical technique, which describes the dynamics of population and coherence of the system. How to employ it to study the pump-probe experiments and fs ultrafast processes is described. The pi pi->pi pi transition of pyrazine is used as an example to demonstrate the application of the density matrix method. Recently, Suzuki's group have employed the 22 fs time resolution laser to study the dynamics of the pi pi* state of pyrazine. In this case, conical intersection is commonly believed to play an important role in this non-adiabatic process. How to treat the effect of conical intersection on non-adiabatic processes and fs time-resolved spectra is presented. Another important ultrafast process, vibrational relaxation, which takes place in sub-ps and ps range and has never been carefully studied, is treated in this paper. The vibrational relaxation in water dimer is chosen to demonstrate the calculation. It should be noted that the vibrational relaxation of (H2O)(2) has not been experimentally studied but it can be accomplished by the pump-probe experiments.
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000303184300015
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/49831]
专题	中国科学院化学研究所
通讯作者	Niu YingLi
作者单位	1.Chinese Acad Sci, Inst Chem, BNLMS, Key Lab Organ Solids, Beijing 100190, Peoples R China 2.NW Univ Xian, Inst Modern Phys, Xian 710069, Peoples R China 3.Tohoku Univ, Fac Sci, Dept Chem, Sendai, Miyagi 980, Japan
推荐引用方式 GB/T 7714	Niu YingLi,Lin ChihKai,Zhu ChaoYuan,et al. Density matrix method and ultrafast processes[J]. SCIENCE CHINA-CHEMISTRY,2012,55(4):579-593.
APA	Niu YingLi.,Lin ChihKai.,Zhu ChaoYuan.,Mineo Hirobumi.,Chao ShengDer.,...&Lin ShengHsien.(2012).Density matrix method and ultrafast processes.SCIENCE CHINA-CHEMISTRY,55(4),579-593.
MLA	Niu YingLi,et al."Density matrix method and ultrafast processes".SCIENCE CHINA-CHEMISTRY 55.4(2012):579-593.