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首页> 外文期刊>The Journal of Chemical Physics >Correlated driving and dissipation in two-dimensional spectroscopy
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Correlated driving and dissipation in two-dimensional spectroscopy

机译:二维光谱中的相关驱动和耗散

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The correlation between coherent driving and non-Markovian dissipation plays a vital role in optical processes. To exhibit its effect on the simulation of optical spectroscopy, we explore the correlated driving-dissipation equation (CODDE) [R. X. Xu and Y. J. Yan, J. Chem. Phys. 116, 9196 (2002)], which modifies the conventional Redfield theory with the inclusion of correlated driving-dissipation effect at the second-order system-bath coupling level. With an exciton model mimicking the Fenna-Matthews-Olson pigment-protein complex, we compare between the Redfield theory, CODDE, and exact hierarchical dynamics, for their results on linear absorption and coherent two-dimensional spectroscopy. We clarify that the failure of Redfield approach originates mainly from the neglect of driving-dissipation correlation, rather than its second-order nature. We further propose a dynamical inhomogeneity parameter to quantify the applicable range of CODDE. Our results indicate that CODDE is an efficient and quantifiable theory for many light-harvesting complexes of interest. To facilitate the evaluation of multi-dimensional spectroscopy, we also develop the mixed Heisenberg-Schr?dinger picture scheme that is valid for any dynamics implementation on nonlinear response functions.
机译:相干驱动和非马尔可夫耗散之间的相关性在光学过程中起着至关重要的作用。为了展示其对光谱学模拟的影响,我们探索了相关的驱动耗散方程(CODDE)[R。 X.Xu和Y.J.Yan,J.Chem。物理116,9196(2002)],它对传统的Redfield理论进行了修改,将二阶系统-浴耦合级的相关驱动耗散效应包括在内。利用模拟Fenna-Matthews-Olson色素-蛋白质复合物的激子模型,我们比较了Redfield理论,CODDE和精确的层次动力学,以求它们在线性吸收和相干二维光谱学上的结果。我们明确指出,雷德菲尔德方法的失败主要源于对驾驶—耗散相关性的忽视,而不是其二阶性质。我们进一步提出了动态不均匀性参数来量化CODDE的适用范围。我们的结果表明,CODDE是许多感兴趣的光捕获复合物的有效且可量化的理论。为了促进多维光谱的评估,我们还开发了混合的Heisenberg-Schr?dinger图片方案,该方案对于非线性响应函数的任何动力学实现均有效。

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