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arXiv 1306.4313physics.chem-phquant-ph
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长时间非绝热量子动力学中高效精确的表面跳跃

Efficient and accurate surface hopping for long time nonadiabatic quantum dynamics

Aaron Kelly, Thomas E. Markland

摘要:

量子经典刘维尔方程提供了一个严格的方法,非绝热量子动力学的基础上表面跳跃型轨迹。然而,在实践中,这种方法的适用性已被限制在短时间内,由于不利的数值缩放。在本文中,我们表明,这个问题可以得到缓解,结合它与一个正式的确切的广义量子主方程处理。这使得在非绝热制度的方法的效率显着提高,使其计算处理的量子动力学的复杂系统长时间。我们证明了我们的方法,通过将其应用到凝聚相电荷转移模型,我们的方法被证明是数值精确的制度,其中最少开关表面跳跃和平均场的方法无法获得正确的速率或长时间的人口。

英文摘要:

The quantum-classical Liouville equation offers a rigorous approach to nonadiabatic quantum dynamics based on surface hopping type trajectories. However, in practice the applicability of this approach has been limited to short times owing to unfavorable numerical scaling. In this paper we show that this problem can be alleviated by combining it with a formally exact generalized quantum master equation treatment. This allows dramatic improvements in the efficiency of the approach in nonadiabatic regimes, making it computationally tractable to treat the quantum dynamics of complex systems for long times. We demonstrate our approach by applying it to a model of condensed phase charge transfer where our method is shown to be numerically exact in regimes where fewest-switches surface hopping and mean field approaches fail to obtain the either the correct rates or long-time populations.

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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