Programme

O.5 -- Oral, NCTP-43

Date: Monday, 30 July 2018

Time: 14:00 - 14:20

Quantum optimal control of coherent pi electron ring current in polycyclic aromatic hydrocarbons

Hirobumi Mineo

Atomic Molecular and Optical Physics Research Group, Advanced Institute of Materials Science, Ton Duc Thang University, Ho Chi Minh City, Vietnam

In this presentation we show results for quantum optimal control (QOC) of coherent pi-electron ring current in polycyclic aromatic hydrocarbons (PAHs). There exist various patterns of coherent pi-electron ring currents since PAHs consist of many benzene rings. These include a localized ring current to a designated benzene ring, perimeter ring current which flows along the edges of PAHs. To demonstrate the QOC procedure of coherent pi-electron ring current in PAHs, we took naphthalene and anthracene as the simplest examples of linear PAHs. The ring current generation mechanisms were clarified by analyzing the temporal evolutions of the electronic excited states by UV or (UV+IR) laser pulses as well as those of electric fields of the optimal laser pulses. Time-dependent simulations of the perimeter ring current and middle ring current of anthracene, which are induced by analytical electric fields of UV pulsed lasers, were performed to reproduce the QOC results. The results suggest that these coherent ring currents can be generated by using analytical pulses without a sophistically designed QOC apparatus.

Presenter: Hirobumi Mineo