Reaction rate calculation with time-dependent invariant manifolds.

Reaction rate calculation with time-dependent invariant manifolds.
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使用瞬态不变流形计算反应速率。

DOI:
10.1063/1.4726125
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发表时间:
2012
期刊:
The Journal of chemical physics
影响因子:
--
通讯作者:
F. Borondo
F. Borondo
中科院分区:
--
文献类型:
--
作者:
T. Bartsch;F. Revuelta;R. M. Benito;F. Borondo

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在任何经典的化学反应性计算中,确定影响反应速率的轨迹是关键的动力学成分。这个问题通常需要对动力学进行全面的数值模拟,特别是当反应系统暴露在热浴的影响下时。作为一种有效的替代方法,我们建议在反应系统的相空间中计算区分反应和非反应轨迹的不变曲面。这些不变流形的位置既取决于时间,也取决于浴缸所施加的驱动力的实现。这些流形允许简单地从它们的初始条件识别反应轨迹,而不需要任何进一步的模拟。在这篇文章中,我们展示了如何计算这些不变流形,并将其用于基于微扰理论的形式精确的反应速率计算中,该计算适用于与噪声环境耦合的任何多维势。
The identification of trajectories that contribute to the reaction rate is the crucial dynamical ingredient in any classical chemical reactivity calculation. This problem often requires a full scale numerical simulation of the dynamics, in particular if the reactive system is exposed to the influence of a heat bath. As an efficient alternative, we propose here to compute invariant surfaces in the phase space of the reactive system that separate reactive from nonreactive trajectories. The location of these invariant manifolds depends both on time and on the realization of the driving force exerted by the bath. These manifolds allow the identification of reactive trajectories simply from their initial conditions, without the need of any further simulation. In this paper, we show how these invariant manifolds can be calculated, and used in a formally exact reaction rate calculation based on perturbation theory for any multidimensional potential coupled to a noisy environment.
DOI: --
发表时间: 2009
期刊: J.Chem.Phys. 131
影响因子: --
作者:
S.Kawai;T.Komatsuzaki
通讯作者: T.Komatsuzaki