OPTICAL-DYNAMICS IN MONODIMENSIONAL AGGREGATES WITH EXCITON-PHONON COUPLING - A NUMERICAL INVESTIGATION ON THE TIME-EVOLUTION OF THE OPTICAL DOORWAY STATE

被引:14
作者
LAMI, A
VILLANI, G
机构
[1] Istituto di Chimica quantistica ed Energetica Molecolare, CNR, 56125 Pisa
关键词
D O I
10.1016/0301-0104(93)80123-Q
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A numerical technique based on the Lanczos tridiagonalization procedure is shown to be suitable for investigating the time evolution of the optical doorway state in model systems exhibiting exciton-phonon coupling. Taking as an example a five-site ring (one harmonic oscillator per site) with site-diagonal exciton-phonon coupling, we present and discuss some results concerning the motion of the vibrational wavepacket in each oscillator, the (time-dependent) delocalization energy for the exciton and the Raman spectra. The numerical results are also used to test the validity of a time-dependent variational approach, which, when appropriate, requires a minor computational effort.
引用
收藏
页码:285 / 294
页数:10
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