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On-the-fly, electric-field-driven, coupled electron-nuclear dynamics

机译:动态,电场驱动的耦合电子核动力学

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摘要

An on-the-fly, electric field driven, coupled electron-nuclear dynamics approach is developed and applied to model the photodissociation of water in the (A) over tilde(B-1(1)) excited state. In this method, a quantum propagator evolves the photon-induced electronic dynamics in the ultrafast time scale, and a quasi-classical surface hopping approach describes the nuclear dynamics in the slower time scale. In addition, strong system-field interactions are explicitly included in the electronic propagator. This theoretical development enables us to study rapid photon-induced bond dissociation dynamics and demonstrates the partial breakdown of electronic coherence as well as electronic population trapping in the excited state when the molecular vibrations detune the system with respect to the applied field. The method offers a practical way to use on-the-fly dynamics for modeling light-molecule interactions that lead to interesting photochemical events.
机译:一种动态的,电场驱动的,耦合的电子-核动力学方法被开发出来,并被用于模拟在波浪线(B-1(1))激发态下(A)中水的光解离。在这种方法中,量子传播器以超快的时间尺度发展光子感应的电子动力学,而准经典的表面跳变方法则以较慢的时间尺度描述了核动力学。此外,电子传播器中明确包括了强大的系统-场交互。这一理论发展使我们能够研究快速的光子诱导的键解离动力学,并证明了当分子振动使系统相对于应用电场失谐时,电子相干性以及激发态的电子种群陷阱的部分破坏。该方法提供了一种实用的方法,可以使用动态动力学对导致有趣的光化学事件的光分子相互作用进行建模。

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