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arXiv 1607.02558quant-phphysics.atm-clusphysics.chem-ph
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利用圆锥相交的动能和几何相位的相干控制

Coherent control using kinetic energy and the geometric phase of a conical intersection

Chelsea Liekhus-Schmaltz, Gregory A. McCracken, Andreas Kaldun, James P. Cryan, Philip H. Bucksbaum

摘要:

具有非零非绝热耦合的分子势能面之间的圆锥相交(CI)通常出现在由至少三个原子组成的任何分子中。它们在描述玻恩-奥本海默近似之外的分子动力学中起着基础性的作用,并已被用于理解各种各样的效应,从光致碎裂和异构化到更奇特的应用,如半导体中的激子裂变。然而,很少有研究使用CI的功能作为连贯控制的工具。在这里,我们展示了两种模式的控制周围的圆锥路口。第一种方法使用连续光场来控制CI附近两个相交电子态上的布居。第二种方法使用脉冲光场来控制在CI周围传输时受到几何相移的波包。这第二种技术很可能是有用的研究中的电子相干现象的核动力学的作用。

英文摘要:

Conical intersections (CI) between molecular potential energy surfaces with non-vanishing non-adiabatic couplings generally occur in any molecule consisting of at least three atoms. They play a fundamental role in describing the molecular dynamics beyond the Born-Oppenheimer approximation and have been used to understand a large variety of effects, from photofragmentation and isomerization to more exotic applications such as exciton fission in semiconductors. However, few studies have used the features of a CI as a tool for coherent control. Here we demonstrate two modes of control around a conical intersection. The first uses a continuous light field to control the population on the two intersecting electronic states in the vicinity of a CI. The second uses a pulsed light field to control wavepackets that are subjected to the geometric phase shift in transit around a CI. This second technique is likely to be useful for studying the role of nuclear dynamics in electronic coherence phenomena.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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