期刊
CHEMICAL PHYSICS
卷 338, 期 2-3, 页码 342-347出版社
ELSEVIER
DOI: 10.1016/j.chemphys.2007.05.012
关键词
coherent electronic states; electron transport; femtochemistry; laser chemistry; quantum chemistry; steering electron dynamics
Excitation of a coherent electronic wave packet, a linear combination of several electronic stationary states, is discussed with a computational example, the A and B low lying excited states of LiH. Such linear combination results in the electron executing a rotation-like motion in the xz plane with a period of 4 fs. The excitation needs to be shorter than this purely electronic reorganization time and yet the mean energy of the photon should be relatively low so that the A and B states are coherently accessed. These two requirements limit the wave form of the few cycle pump pulse. (c) 2007 Elsevier B.V. All rights reserved.
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