Speaker: Dr. Ai Qing  

Department of Chemistry, National Taiwan University

Abstract: We study the exciton energy transfer (EET) in an artificial light-harvesting network. In this system, four bacterio-chlorophylls are laid in one line with the total distance between two ends fixed, while the distances between two neighboring sites can be varied. In order to investigate the quantum dynamics, we make use of a newly-developed approach, the coherent modified Redfield theory. Furthermore, for the sake of efficiency, the non-Markovian quantum trajectory method is applied to the numerical simulation. It is discovered that the effective transfer rate is maximized if the donor and acceptor cluster are dimerized, respectively. Therefore, for this given topology, we find that the optimized parameters for the EET. Our results also reveal several crucial factors to the EET efficiency, including the appropriate coupling strength between two neighboring sites and the energy matching condition. All these discoveries may be beneficial to the future innovation of artificial light-harvesting network. 

报告人简介：艾清，博士毕业于清华大学物理系，现为台湾大学化学系博士后。主要从事量子信息、鸟类迁徙中的方向识别与光合作用中能量传输过程中的量子效应。 

Date&Time: October 22, 2012 (Monday), 16:00–17:00
Location: 606 Conference Room